CN213007056U - Scraping and printing device of printing machine - Google Patents
Scraping and printing device of printing machine Download PDFInfo
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- CN213007056U CN213007056U CN202021363031.0U CN202021363031U CN213007056U CN 213007056 U CN213007056 U CN 213007056U CN 202021363031 U CN202021363031 U CN 202021363031U CN 213007056 U CN213007056 U CN 213007056U
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Abstract
The utility model relates to a calico printing machine scraping device, it includes ink pad, conduction band, one-level support, is located one-level sprocket feed structure, the second grade support of one-level support and is located the second grade sprocket feed structure of second grade support, connects between the power take off end of one-level sprocket feed structure and second grade sprocket feed structure to be provided with the scraping ware, be provided with the one-level driving motor who is used for driving one-level sprocket feed structure in the one-level support, be provided with the second grade driving motor who is used for driving second grade sprocket feed structure in the second grade support, the electricity is connected with between one-level driving motor and the second grade driving motor and is used for making the synchronous pivoted motor synchronizer of one-level driving motor and second grade driving. The application has the effect of meeting the printing requirement of large-area patterns.
Description
Technical Field
The application relates to the field of printing equipment, in particular to a scraping and printing device of a printing machine.
Background
At present, screen printing, roller printing and transfer printing are three common fabric printing modes, and screen printing is a printing process derived from stencil printing. Screen printing was originally performed manually, and with the development of technology, semi-automatic and fully automatic mechanical printing processes have been developed. Among them, rotary screen printing and flat screen printing have become the most dominant printing methods at present, and most textile printing adopts the two printing processes.
A flat-screen printing machine in the related art, referring to fig. 1, generally includes a cloth feeding device, a conduction band sizing device, a screen printing unit machine, a rewinding washing device, a hot air drying room and a cloth discharging device, which are connected in sequence. Wherein, screen cloth stamp unit machine sets up in the ink pad top and is provided with a plurality ofly along the length direction of ink pad, and screen cloth stamp unit machine includes one-level support and second grade support, one-level support and second grade support all extend the setting along perpendicular to ink pad length direction's direction, and be provided with the sprocket feed structure in the one-level support and the second grade support, and the sprocket feed structure is connected with between the power take off of two sprocket feed structures and scrapes the seal ware including power take off end, is connected with between one-level support and the second grade support and scrapes the seal net, scrapes the seal ware and is located the top of scraping the seal net. Be provided with the initiative drive structure who is used for driving sprocket drive structure in the one-level support, be provided with the driven drive structure who is used for driving sprocket drive structure in the second grade support, the initiative drive structure includes the initiative driving motor, realize connecting the transmission through a transmission shaft between initiative drive structure and the driven drive structure, when the initiative driving motor during operation, the transmission shaft rotates and drives driven drive structure concerted movement, can realize the sprocket drive structure simultaneous movement in one-level support and the second grade support, thereby make the both ends of scraping the seal ware driven simultaneously, make the direction along the perpendicular to ink pad of scraping the seal ware realize reciprocating motion, thereby realize the printing function.
To the correlation technique among the above-mentioned, in the in-process of in-service use, when the printing of large tracts of land pattern need be carried out, the size of scraping the seal net also needs to increase thereupon, thereby make the distance between one-level support and the second grade support also increase, thereby need to change between initiative drive structure and the driven drive structure and join in marriage longer and the bigger transmission shaft of diameter and realize the simultaneous movement of two sprocket drive structures, and change after joining in marriage longer and thicker transmission shaft, original initiative driving motor's output torque is not enough, need to change more powerful initiative driving motor and carry out the adaptation, lead to cost increase. Meanwhile, the stability of the transmission shaft with larger size in the movement process is poor, and the transmission shaft is more easily damaged in the working process. In summary, the transmission method in the related art cannot meet the printing requirement of large-area patterns.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that the transmission mode in the current flat screen printing equipment can't satisfy the large tracts of land pattern printing demand, this application provides a calico printing machine scraping device.
The application provides a calico printing machine scraping device adopts following technical scheme:
the utility model provides a calico printing machine scraping device, includes ink pad, conduction band, one-level support, is located one-level sprocket feed structure, the second grade support of one-level support and is located the second grade sprocket feed structure of second grade support, connects between the power take off end of one-level sprocket feed structure and second grade sprocket feed structure to be provided with the scraping seal ware, be provided with the one-level driving motor who is used for driving one-level sprocket feed structure in the one-level support, be provided with the second grade driving motor who is used for driving second grade sprocket feed structure in the second grade support, the electricity is connected with between one-level driving motor and the second grade driving motor and is used for making one-level driving motor and second grade driving motor synchronous rotating.
By adopting the technical scheme, the motor synchronizer is used for controlling the primary driving motor and the secondary driving motor to synchronously rotate, so that a connecting line between the power output end of the primary chain wheel transmission structure and the power output end of the secondary chain wheel transmission structure is always kept in a vertical state with the primary support when the power output ends move, and the scraping and printing device can realize stable reciprocating motion along the length direction of the primary support. Compared with the prior art, one-level sprocket feed structure and second grade sprocket feed structure have independent driving source respectively in this scheme, one-level sprocket feed structure receives one-level driving motor's drive promptly, second grade sprocket feed structure receives second grade driving motor's drive, need not to realize synchronous motion through the transmission shaft between one-level sprocket feed structure and the second grade sprocket feed structure, after having lost the constraint of transmission shaft, distance between can greatly increased one-level support and the second grade support, thereby be applicable to large tracts of land pattern, especially the printing demand of the great pattern of width.
Preferably, the motor synchronization device comprises an infrared distance sensor and a closed-loop controller, the infrared distance sensor comprises a primary infrared transmitter and a primary infrared receiver which are positioned at the same horizontal height, the primary infrared receiver is arranged at one end of a primary support, a primary mounting block is arranged between a power output end of the primary chain wheel transmission structure and the squeegee, the primary infrared transmitter is arranged at one side of the primary mounting block close to the primary infrared receiver, and infrared rays emitted by the primary infrared transmitter are parallel to the primary support;
the infrared distance sensor is also arranged at the position of the secondary support, the primary infrared receiver is arranged at one end of the secondary support, a secondary mounting block is arranged between the power output end of the secondary chain wheel transmission structure and the squeegee, the primary infrared transmitter is arranged at one side of the secondary mounting block close to the primary infrared receiver, and the infrared rays emitted by the primary infrared transmitter are parallel to the secondary support;
the infrared distance sensors of the first-stage support and the second-stage support are electrically connected with a closed-loop controller, and the closed-loop controller is electrically connected with a first-stage driving motor and a second-stage driving motor.
By adopting the technical scheme, the control process of the closed-loop controller in the application is divided into two stages, taking the drive control process of the primary support as an example, in the first stage, the primary drive motor has original input information, so that the primary drive motor carries out power output at a certain rotating speed and controls the primary mounting block to move towards the direction far away from the primary drive motor, and the expected state of the first stage is that the primary mounting block moves to the tail end of the primary support, namely the measured distance value of the infrared distance sensor is 0; in the process of controlling by the closed-loop controller, the closed-loop controller feeds back to an input end, namely a primary driving motor after operation according to the deviation information, the deviation information is integrated with original input information to obtain new input information, so that the rotating speed of the primary driving motor is adjusted, the expected state is finally reached, and the first stage is finished when the expected state is reached;
the second stage starts when the first stage is finished, the first-stage driving motor has original input information, so that the first-stage driving motor outputs power at a certain rotating speed and controls the first-stage mounting block to move towards the direction close to the first-stage driving motor, the expected state of the second stage is that the first-stage mounting block moves to the other end of the first-stage support, namely the measured distance value of the infrared distance sensor reaches the maximum value, and the maximum value is recorded as L; in the process of controlling by the closed-loop controller, the closed-loop controller feeds back to an input end after operation according to the deviation information, the deviation information is integrated with original input information to obtain new input information, so that the rotating speed of the first-stage driving motor is adjusted and finally reaches an expected state, when the expected state is reached, the second stage is ended, and the first stage is started;
the first stage and the second stage are carried out in a circulating mode, and therefore reciprocating linear motion of the primary mounting block in the length direction of the primary support is achieved. Meanwhile, the second-stage mounting block at the second-stage support realizes linear reciprocating motion in the same mode under the control of the closed-loop controller, and synchronous motion can be realized between the first-stage mounting block and the second-stage mounting block under the conditions that the closed-loop controller controls the first-stage driving motor and the second-stage driving motor in the same parameters and the starting positions of the first-stage mounting block and the second-stage mounting block are the same.
Preferably, the closed-loop controller includes a proportional control module, and the closed-loop controller further includes one or both of an integral control module and a differential control module.
By adopting the technical scheme, the proportion control module multiplies the information by the proportion constant according to the error information at a certain moment to obtain new input information, and when the error value is continuously reduced, the new input information is also continuously reduced;
the integral control module multiplies the error information at each moment by time increment and accumulates the time increment, the result obtained by multiplying the accumulated result by an integral constant is fed back to the input information to adjust the input information, the error value is continuously reduced and continuously oscillates at a stable value in the later period of adjustment of the proportional control module, when interference exists in the system, the stable value can never reach an expected state, the integral control module can accumulate the continuously existing error and feed back the accumulated result to the input information, so that the new input value is increased, and the stable value is close to the expected state;
the differential control module subtracts error information at a certain moment from error information at a previous moment and divides the difference by time increment to obtain a differential result, and feeds the result obtained by multiplying the differential result by a differential constant back to the input information to adjust the input information;
the error value can be continuously close to the expected value through the proportional control module, and in order to improve the stability of the control system, a worker can also select to add one or two of the integral control module or the differential control module to adjust the control process of the closed-loop controller.
Preferably, the primary support is provided with an infrared position sensor, the infrared position sensor comprises a secondary infrared transmitter and a secondary infrared receiver, the secondary infrared transmitter is positioned at a primary mounting block of the primary chain wheel transmission structure in the primary support, and when the secondary infrared transmitter moves to the middle position of the primary support along with the primary mounting block, infrared light emitted by the secondary infrared transmitter vertically irradiates the secondary infrared receiver;
the infrared position sensor is also arranged on the secondary support, the secondary infrared receiver is positioned at a secondary mounting block of a secondary chain wheel transmission structure in the secondary support, and when the secondary infrared receiver moves to the middle position of the secondary support along with the secondary mounting block, the infrared optical fiber emitted by the secondary infrared emitter vertically shoots at the secondary infrared receiver;
and the infrared position sensors on the first-stage support and the second-stage support are electrically connected with the closed-loop controller.
By adopting the technical scheme, when the closed-loop controller simultaneously controls and adjusts the movement of the first-stage driving motor and the second-stage driving motor, errors are inevitably generated between the first-stage support and the second-stage support, so that the synchronous state of the first-stage driving motor and the synchronous state of the second-stage driving motor are deviated, and the normal work of the scraping and printing device is finally influenced. An infrared position sensor is arranged in the middle of the primary support and the secondary support, and when the primary mounting block moves to the middle of the primary support, the infrared position sensor measures a moment value; at this time, the secondary mounting block also moves to the middle position of the secondary bracket and a time value is measured. The closed-loop controller compares the time values measured by the two infrared sensors, a worker needs to set an expected value, and when the difference value of the time values measured by the two infrared sensors is smaller than the expected value, the synchronization degree between the primary driving motor and the secondary driving motor is judged to be higher; when the difference value of the time values measured by the two infrared sensors is larger than or equal to an expected value, the poor synchronization degree between the first-stage driving motor and the second-stage driving motor is judged, and the motion of the first-stage driving motor and the motion of the second-stage driving motor need to be readjusted through the closed-loop controller so as to improve the synchronization degree between the first-stage driving motor and the second-stage driving motor.
Preferably, two infrared distance sensors are arranged on the primary support, primary infrared receivers of the two infrared distance sensors on the primary support are respectively arranged at two ends of the primary support in the length direction, and infrared transmitters of the two primary infrared distance sensors on the primary support are respectively arranged at two sides of the primary mounting block;
the infrared distance sensors are arranged on the secondary support, one-level infrared receivers of the two infrared distance sensors on the secondary support are arranged at two ends of the secondary support in the length direction respectively, and one-level infrared transmitters of the two infrared distance sensors on the secondary support are arranged on two sides of the secondary mounting block respectively.
Through adopting above-mentioned technical scheme, when printing large tracts of land pattern, not only the distance between one-level support and the second grade support is great, and the length of one-level support and second grade support itself also can corresponding increase. Taking the first-level support as an example, when only being equipped with an infrared distance sensor on the first-level support, when the distance between first-level infrared receiver and the first-level infrared transmitter constantly increases, relative error between the two can increase, probably leads to first-level infrared receiver can't receive the signal that comes from first-level infrared transmitter at a distance to lead to closed-loop controller to break down. Therefore, two infrared distance sensors are symmetrically arranged on the primary support, and the infrared position sensor is used as a change-over switch between the two infrared distance sensors. On one-level support, establish one end of one-level support as point A, the position of one-level installation piece is point B, and the other end of one-level support is established as point C, and the length between point A and the point C is S, and the measured value of infrared distance sensor between point A and the point B is E1, and the measured value of infrared distance sensor between point B and the point C is E2, then:
when the first-stage mounting block moves from the point A to the center position of the first-stage support, the closed-loop controller controls the first-stage driving motor in a first-stage control process, the infrared distance sensor between the point A and the point B measures at the moment, the deviation information of the control stage is (S-E1), and when the first-stage mounting block passes through the second-stage infrared receiver, the infrared distance sensor between the point A and the point B stops working and is switched to the infrared distance sensor between the point B and the point C to work;
when the first-stage mounting block moves from the center position of the first-stage support to the point C, the closed-loop controller controls the first-stage driving motor in the first-stage control process, and the deviation information of the control stage is E2;
when the first-stage mounting block moves from the point C to the center position of the first-stage support, the closed-loop controller controls the first-stage driving motor in a second-stage control process, deviation information of the control stage is E2, when the first-stage mounting block passes through the second-stage infrared receiver, the infrared distance sensor between the point B and the point C stops working, and the infrared distance sensor between the point A and the point B is switched to work;
when the center position of the first-stage mounting block hole and the first-stage support moves to the point A, the closed-loop controller controls the first-stage driving motor in the second-stage control process, and the deviation information of the control stage is (S-E1).
In the control process, the two infrared distance sensors are continuously switched to start and stop to carry out measurement, so that the measurement progress of the infrared distance sensors can be effectively improved, and the infrared distance sensors are more suitable for printing large-area patterns.
Preferably, the infrared distance sensor further comprises a limit stop, the limit stop is arranged on the first-stage installation block and the second-stage installation block and is arranged close to the first-stage infrared transmitter, installation panels for fixing the first-stage infrared receiver are respectively arranged at two ends of the first-stage support and the second-stage support, when the limit stop moves to positions at two ends of the first-stage support along with the first-stage installation block, the limit stop is abutted to the installation panels, and a gap is formed between the first-stage infrared transmitter and the first-stage infrared receiver;
when limit stop moves to the position of two-stage support both ends along with second grade installation piece, limit stop and installation panel butt and one-level infrared transmitter and one-level infrared receiver between have the clearance.
Through adopting above-mentioned technical scheme, in infrared distance sensor's working process, limit stop can prescribe a limit to the shortest distance between one-level infrared transmitter and the one-level infrared receiver, reduces at the motion in-process of one-level installation piece, leads to the possibility of damaging because frequently bumping between one-level infrared transmitter and the one-level infrared receiver. It should be noted that, when debugging the infrared distance sensor and the closed-loop controller is performed, and the limit stopper needs to be abutted against the mounting panel, the distance between the first-stage infrared transmitter and the first-stage infrared receiver is set to zero as the expected state of the first stage and the second stage.
Preferably, the one end of one-level support is provided with the installation storehouse, one-level driving motor sets up in the installation storehouse, one-level sprocket feed structure includes initiative synchronizing wheel and driven synchronizing wheel, the initiative synchronizing wheel is close to the installation storehouse setting, be connected with the synchronizing chain between initiative synchronizing wheel and the driven synchronizing wheel, wear to be equipped with the power shaft in the initiative synchronizing wheel, the last fixed drive gear that is provided with of power shaft, be provided with the driving gear on the one-level driving motor, intermeshing between driving gear and the driven gear.
By adopting the technical scheme, the load of a single driving motor is reduced due to the fact that the primary driving motor and the secondary driving motor are arranged at the same time. Therefore, the first-stage driving motor can adopt a driving motor with smaller volume and smaller power, so that the first-stage driving motor can be directly installed in the installation bin, and the first-stage driving motor and the first-stage chain wheel transmission structure directly use a gear transmission structure with higher transmission efficiency for transmission, thereby effectively reducing the space occupied by equipment.
Preferably, a heat dissipation opening is formed in the side wall of the installation bin, and a heat dissipation metal mesh is attached to the heat dissipation opening.
Through adopting above-mentioned technical scheme, the thermovent can cool down the one-level driving motor and the second grade driving motor in the work, and the heat dissipation metal mesh can reduce external dust and get into to installing in the storehouse.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the primary driving motor, the secondary driving motor and the motor synchronizer are arranged, so that the effect of meeting the requirement of large-area pattern printing can be achieved;
2. the infrared position sensor is arranged, so that the effect of improving the synchronization degree of the two-stage motion of the scraping and printing device can be achieved;
3. through the setting of two sets of infrared distance sensor, can play the effect that improves control accuracy.
Drawings
Fig. 1 is a schematic view of the overall structure of a related art screen printing unit machine of the background art.
Fig. 2 is a schematic overall structure diagram of a scraping and printing device of a decorating machine according to an embodiment of the application.
Fig. 3 is a top view of the overall structure of a scraping device of a decorating machine according to an embodiment of the application.
Fig. 4 is a schematic partial cross-sectional view in the direction C-C in fig. 5.
Fig. 5 is an enlarged schematic view of a portion a in fig. 2.
Fig. 6 is an enlarged schematic view of a portion B in fig. 2.
Fig. 7 is a control flow diagram of a closed-loop controller of a scraping and printing device of a decorating machine according to an embodiment of the application.
Description of reference numerals, 1, a printing pad; 11. a conduction band; 2. a screen printing unit machine; 21. scraping and printing the screen; 22. an active drive structure; 23. actively driving the motor; 24. a drive shaft; 3. a primary support; 31. installing a panel; 32. installing a bin; 33. a first-stage drive motor; 331. a driving gear; 4. a secondary scaffold; 41. a secondary drive motor; 5. a primary sprocket drive structure; 51. a first-level mounting block; 52. a driving synchronizing wheel; 53. a driven synchronizing wheel; 54. a synchronization chain; 55. a power shaft; 551. a transmission gear; 6. a secondary sprocket drive structure; 61. a secondary mounting block; 7. a squeegee; 8. a motor synchronization device; 81. an infrared distance sensor; 811. a primary infrared emitter; 812. a primary infrared receiver; 813. a limit stop block; 82. an infrared position sensor; 821. a secondary infrared emitter; 822. a secondary infrared receiver; 83. a closed-loop controller; 831. a proportional control module; 832. an integral control module; 833. and a differential control module.
Detailed Description
The present application is described in further detail below with reference to figures 1-7.
The embodiment of the application discloses calico printing machine scraping device. Referring to fig. 2, the scraping and printing device of the printing machine comprises a printing pad 1 and a guide belt 11, wherein a primary support 3 and a secondary support 4 which are perpendicular to the length direction of the printing pad 1 are arranged on the printing pad 1, the primary support 3 and the secondary support are arranged in parallel, a primary chain wheel transmission structure 5 is arranged in the primary support 3, and a secondary chain wheel transmission structure 6 is arranged in the secondary support 4.
Referring to fig. 3 and 4, an installation bin 32 is arranged at one end of the primary support 3, a heat dissipation port 321 is formed in a side wall of the installation bin 32, a heat dissipation metal mesh (not shown) is attached to the heat dissipation port 321, a primary driving motor 33 is arranged in the installation bin 32, the primary sprocket transmission structure 5 comprises a driving synchronizing wheel 52 and a driven synchronizing wheel 53, the driving synchronizing wheel 52 is arranged close to the installation bin 32, a synchronizing chain 54 is connected between the driving synchronizing wheel 52 and the driven synchronizing wheel, a power shaft 55 penetrates through the driving synchronizing wheel 52, a transmission gear 551 is fixedly arranged on the power shaft 55, a driving gear 331 is arranged at an output end of the primary driving motor 33, and the driving gear 331 and the driven gear are meshed with each other.
Referring to fig. 3 and 4, the installation bin 32 is further disposed at one end of the secondary support 4, and a secondary driving motor 41 is disposed therein, the secondary sprocket transmission structure 6 is the same as the primary sprocket transmission structure 5, and the connection transmission manner between the secondary sprocket transmission structure 6 and the secondary driving motor 41 is the same as the connection transmission manner between the primary sprocket transmission structure 5 and the primary motor.
Referring to fig. 5 and 6, the scraping device of the printing machine comprises an infrared distance sensor 81, an infrared position sensor 82 and a closed-loop controller 83.
Referring to fig. 5, the infrared distance sensor 81 includes a primary infrared transmitter 811 and a primary infrared receiver 812 at the same level, the primary infrared receiver 812 is disposed at one end of the primary bracket 3, a primary mounting block 51 is disposed between the power output end of the primary sprocket drive structure 5 and the squeegee 7, the primary infrared transmitter 811 is disposed at one side of the primary mounting block 51 near the primary infrared receiver 812, and the infrared rays emitted by the primary infrared transmitter 811 are parallel to the primary bracket 3;
the infrared distance sensor 81 is also arranged at the position of the secondary support 4, the primary infrared receiver 812 is arranged at one end of the secondary support 4, a secondary mounting block 61 is arranged between the power output end of the secondary chain wheel transmission structure 6 and the squeegee 7, the primary infrared transmitter 811 is arranged at one side of the secondary mounting block 61 close to the primary infrared receiver 812, and the infrared rays emitted by the primary infrared transmitter 811 are parallel to the secondary support 4;
the infrared distance sensors 81 of the first-stage support 3 and the second-stage support 4 are electrically connected with the closed-loop controller 83, and the closed-loop controller 83 is electrically connected with the first-stage driving motor 33 and the second-stage driving motor 41.
Referring to fig. 5, two infrared distance sensors 81 are arranged on the primary support 3, the primary infrared receivers 812 of the two infrared distance sensors 81 on the primary support 3 are respectively arranged at two ends of the primary support 3 in the length direction, and the infrared transmitters of the two primary infrared distance sensors 81 on the primary support 3 are respectively arranged at two sides of the primary mounting block 51;
two infrared distance sensors 81 are arranged on the secondary support 4, one-level infrared receivers 812 of the two infrared distance sensors 81 on the secondary support 4 are respectively arranged at two ends of the secondary support 4 in the length direction, and one-level infrared transmitters 811 of the two infrared distance sensors 81 on the secondary support 4 are respectively arranged at two sides of the secondary mounting block 61.
Referring to fig. 5, the infrared distance sensor 81 further includes a limit stopper 813, the limit stopper 813 is disposed on the first-stage mounting block 51 and the second-stage mounting block 61, the limit stopper 813 is disposed near the first-stage infrared emitter 811, the mounting panels 31 for fixing the first-stage infrared receiver 812 are disposed at two ends of the first-stage support 3 and the second-stage support 4, when the limit stopper 813 moves to two end positions of the first-stage support 3 along with the first-stage mounting block 51, the limit stopper 813 abuts against the mounting panels 31, and a gap exists between the first-stage infrared emitter 811 and the first-stage infrared receiver 812;
when the limit stopper 813 moves to the two end positions of the secondary bracket 4 along with the secondary mounting block 61, the limit stopper 813 abuts against the mounting panel 31 and a gap exists between the primary infrared transmitter 811 and the primary infrared receiver 812.
Referring to fig. 5 and 6, the primary support 3 is provided with an infrared position sensor 82, the infrared position sensor 82 includes a secondary infrared transmitter 821 and a secondary infrared receiver 822, the secondary infrared transmitter 821 is located at the primary mounting block 51 of the sprocket transmission structure in the primary support 3, and when the secondary infrared transmitter 821 moves to the middle position of the primary support 3 along with the primary mounting block 51, infrared light emitted by the secondary infrared transmitter 821 is vertically emitted to the secondary infrared receiver 822;
the infrared position sensor 82 is also arranged on the secondary support 4, the secondary infrared transmitter 821 is positioned at the secondary mounting block 61 of the chain wheel transmission structure in the secondary support 4, and when the secondary infrared transmitter 821 moves to the middle position of the secondary support 4 along with the secondary mounting block 61, the infrared optical fiber emitted by the secondary infrared transmitter 821 vertically shoots to the secondary infrared receiver 822;
the infrared position sensors 82 on the primary support 3 and the secondary support 4 are both electrically connected with a closed-loop controller 83.
Referring to fig. 7, the closed-loop controller 83 includes a proportional control module 831, and the closed-loop controller 83 further includes one or both of an integral control module 832 and a derivative control module 833.
The proportional control module 831 multiplies the error information at a certain moment by a proportional constant to obtain new input information, and when the error value is continuously reduced, the new input information is also continuously reduced;
the integral control module 832 multiplies the error information at each moment by a time increment and accumulates the time increment, the result obtained by multiplying the accumulated result by an integral constant is fed back to the input information to adjust the input information, the error value is continuously reduced and continuously oscillates at a stable value at the later stage of adjustment of the proportional control module 831, when interference exists in the system, the stable value may never reach an expected state, and the integral control module 832 can accumulate the continuously existing error and feed back the accumulated result to the input information, so that a new input value is increased, and the stable value is close to the expected state;
the differential control module 833 subtracts the error information at a certain moment from the error information at the previous moment and divides the difference by the time increment to obtain a differential result, and feeds the result obtained by multiplying the differential result by a differential constant back to the input information to adjust the input information, when the error value is too large in oscillation in the process of approaching the expected state, the differential control module 833 can be introduced to control the oscillation of the error value and control the magnitude of overshoot, so that the time required for the error value to reach the expected state and be stable is effectively reduced;
the error value can be continuously approached to the desired value by the proportional control module 831, and in order to improve the stability of the control system, the operator can also choose to add one or both of the integral control module 832 and the differential control module 833 to adjust the control process of the closed-loop controller 83.
The application principle of the scraping and printing device of the printing machine in the embodiment of the application is as follows:
the control process of the closed-loop controller 83 in this application is divided into two stages, taking the driving control process of the primary support 3 as an example, in the first stage, the primary driving motor 33 has original input information, so that the primary driving motor 33 performs power output at a certain rotation speed and controls the primary mounting block 51 to move in a direction away from the primary driving motor 33, and the expected state of the first stage is that the primary mounting block 51 moves to the end of the primary support 3, that is, the measured distance value of the infrared distance sensor 81 is 0; the deviation information of the first stage is measured by the infrared distance sensor 81, namely the actual distance from the primary infrared transmitter 811 to the primary infrared receiver 812, in the process of control by the closed-loop controller 83, the closed-loop controller 83 feeds back the calculated deviation information to the input end, namely the primary driving motor 33, and the deviation information is integrated with the original input information to obtain new input information, so that the rotating speed of the primary driving motor 33 is adjusted, the expected state is finally reached, and when the expected state is reached, the first stage is finished;
when the second stage starts from the end of the first stage, the primary driving motor 33 has original input information, so that the primary driving motor 33 outputs power at a certain rotating speed and controls the primary mounting block 51 to move towards the direction close to the primary driving motor 33, and the expected state of the second stage is that the primary mounting block 51 moves to the other end of the primary bracket 3, namely the measured distance value of the infrared distance sensor 81 reaches the maximum value, and the maximum value is recorded as L; the deviation information of the second stage is measured by the infrared distance sensor 81, namely the actual distance from the primary infrared transmitter 811 to the primary infrared receiver 812, in the process of control by the closed-loop controller 83, the closed-loop controller 83 feeds back the calculated deviation information to the input end, the deviation information is integrated with the original input information to obtain new input information, so that the rotating speed of the primary driving motor 33 is adjusted and finally reaches the expected state, when the expected state is reached, the second stage is ended, and the first stage is started;
the first stage and the second stage are cyclically performed, thereby achieving the reciprocating linear motion of the primary mounting block 51 in the length direction of the primary support 3. Meanwhile, the second-stage mounting block 61 at the second-stage support 4 realizes linear reciprocating motion in the same way under the control of the closed-loop controller 83, and under the condition that the closed-loop controller 83 has the same control parameters for the first-stage driving motor 33 and the second-stage driving motor 41, and the starting positions of the first-stage mounting block 51 and the second-stage mounting block 61 are the same, synchronous motion can be realized between the first-stage mounting block 51 and the second-stage mounting block 61. The limit stopper 813 may define the shortest distance between the primary infrared transmitter 811 and the primary infrared receiver 812 during the operation of the infrared distance sensor 81, reducing the possibility of damage between the primary infrared transmitter 811 and the primary infrared receiver 812 due to frequent collision during the movement of the primary mounting block 51. Note that, when the limit stopper 813 is brought into contact with the mounting panel 31 when debugging the infrared distance sensor 81 and the closed-loop controller 83, the distance between the primary infrared transmitter 811 and the primary infrared receiver 812 is set to zero as a desired state in the first stage and the second stage.
When the closed-loop controller 83 controls and adjusts the movement of the primary driving motor 33 and the secondary driving motor 41 at the same time, the error is inevitably generated between the primary support 3 and the secondary support 4, which causes the deviation of the synchronization state of the primary driving motor 33 and the secondary driving motor 41, and finally affects the normal operation of the squeegee 7. Therefore, the infrared position sensor 82 is arranged at the middle position of the primary bracket 3 and the secondary bracket 4, and when the primary mounting block 51 moves to the middle position of the primary bracket 3, the infrared position sensor 82 measures a moment value; at this time, the secondary mount block 61 also moves to the middle position of the secondary support 4 and a time value is measured. The closed-loop controller 83 compares the time values measured by the two infrared sensors, a worker needs to set an expected value, and when the difference value of the time values measured by the two infrared sensors is smaller than the expected value, the synchronization degree between the primary driving motor 33 and the secondary driving motor 41 is judged to be higher; when the difference between the time values measured by the two infrared sensors is greater than or equal to the expected value, it is determined that the synchronization degree between the primary driving motor 33 and the secondary driving motor 41 is not good, and the motion of the primary driving motor 33 and the motion of the secondary driving motor 41 need to be readjusted by the closed-loop controller 83, so as to improve the synchronization degree between the primary driving motor 33 and the secondary driving motor 41.
When a large-area pattern is printed, not only is the distance between the primary support 3 and the secondary support 4 larger, but also the lengths of the primary support 3 and the secondary support 4 are correspondingly increased. Taking the first-stage bracket 3 as an example, when only one infrared distance sensor 81 is disposed on the first-stage bracket 3, when the distance between the first-stage infrared receiver 812 and the first-stage infrared transmitter 811 is continuously increased, the relative error between the first-stage infrared receiver 812 and the first-stage infrared transmitter 811 is increased, which may cause the first-stage infrared receiver 812 to fail to receive the signal from the first-stage infrared transmitter 811 at a distance, thereby causing the closed-loop controller 83 to malfunction. Therefore, two infrared distance sensors 81 are symmetrically arranged on the primary support 3, and the infrared position sensor 82 is used as a switch between the two infrared distance sensors 81. On the primary support 3, with one end of the primary support 3 set as point a, the position of the primary mounting block 51 set as point B, the other end of the primary support 3 set as point C, the length between point a and point C is S, the measured value of the infrared distance sensor 81 between point a and point B is E1, and the measured value of the infrared distance sensor 81 between point B and point C is E2, then:
when the primary mounting block 51 moves from the point a to the center position of the primary bracket 3, the closed-loop controller 83 controls the primary driving motor 33 in a first stage of control process, at this time, the infrared distance sensor 81 between the point a and the point B measures, and the deviation information of the control stage is (S-E1), when the primary mounting block 51 passes through the secondary infrared receiver 822, the infrared distance sensor 81 between the point a and the point B stops working, and the infrared distance sensor 81 between the point B and the point C is switched to work;
when the primary mounting block 51 moves from the center position of the primary support 3 to the point C, the closed-loop controller 83 controls the primary driving motor 33 in the first stage of control process, and the deviation information of the control stage is E2;
when the first-stage mounting block 51 moves from the point C to the center position of the first-stage bracket 3, the closed-loop controller 83 controls the first-stage driving motor 33 in the second-stage control process, and the deviation information of the control stage is E2, when the first-stage mounting block 51 passes through the second-stage infrared receiver 822, the infrared distance sensor 81 between the point B and the point C stops working, and the infrared distance sensor 81 between the point a and the point B is switched to work;
when the center position of the primary mounting block 51, the hole, and the primary support 3 moves to the point a, the closed-loop controller 83 controls the primary driving motor 33 in the second stage of the control process, and the deviation information of the control stage is (S-E1).
In the control process, the two infrared distance sensors 81 are continuously switched to start and stop to carry out measurement, so that the measurement progress of the infrared distance sensors 81 can be effectively improved, and the infrared distance sensors are more suitable for printing large-area patterns.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The utility model provides a calico printing machine scraping device, includes ink pad (1), conduction band (11), one-level support (3), be located one-level sprocket feed structure (5) of one-level support (3), second grade support (4) and be located second grade sprocket feed structure (6) of second grade support (4), connect between the power take off end of one-level sprocket feed structure (5) and second grade sprocket feed structure (6) to be provided with and scrape seal ware (7), its characterized in that: be provided with one-level driving motor (33) that is used for driving one-level sprocket drive structure (5) in one-level support (3), be provided with second grade driving motor (41) that are used for driving second grade sprocket drive structure (6) in second grade support (4), be connected with between one-level driving motor (33) and second grade driving motor (41) and be used for making one-level driving motor (33) and second grade driving motor (41) synchronous rotation's motor synchronizer (8).
2. The scraping device of the printing machine according to claim 1, wherein: the motor synchronization device (8) comprises an infrared distance sensor (81) and a closed-loop controller (83), the infrared distance sensor (81) comprises a primary infrared transmitter (811) and a primary infrared receiver (812) which are located at the same horizontal height, the primary infrared receiver (812) is arranged at one end of a primary support (3), a primary mounting block (51) is arranged between the power output end of the primary chain wheel transmission structure (5) and the squeegee (7), the primary infrared transmitter (811) is arranged on one side, close to the primary infrared receiver (812), of the primary mounting block (51), and infrared rays emitted by the primary infrared transmitter (811) are parallel to the primary support (3);
the infrared distance sensor (81) is further arranged at the position of the secondary support (4), the primary infrared receiver (812) is arranged at one end of the secondary support (4), a secondary mounting block (61) is arranged between the power output end of the secondary chain wheel transmission structure (6) and the squeegee (7), the primary infrared transmitter (811) is arranged on one side, close to the primary infrared receiver (812), of the secondary mounting block (61), and infrared rays emitted by the primary infrared transmitter (811) are parallel to the secondary support (4);
the infrared distance sensors (81) of the first-stage support (3) and the second-stage support (4) are electrically connected with a closed-loop controller (83), and the closed-loop controller (83) is electrically connected with a first-stage driving motor (33) and a second-stage driving motor (41).
3. The scraping device of the printing machine according to claim 2, wherein: the closed-loop controller (83) comprises a proportional control module (831), and the closed-loop controller (83) further comprises one or two of an integral control module (832) and a derivative control module (833).
4. The scraping device of the printing machine according to claim 3, wherein: the infrared position sensor (82) is arranged on the primary support (3), the infrared position sensor (82) comprises a secondary infrared transmitter (821) and a secondary infrared receiver (822), the secondary infrared transmitter (821) is located at a primary mounting block (51) of the primary chain wheel transmission structure (5) in the primary support (3), and when the secondary infrared transmitter (821) moves to the middle position of the primary support (3) along with the primary mounting block (51), infrared light rays emitted by the secondary infrared transmitter (821) vertically irradiate the secondary infrared receiver (822);
the infrared position sensor (82) is further arranged on the secondary support (4), the secondary infrared receiver (822) is located at a secondary mounting block (61) of the secondary chain wheel transmission structure (6) in the secondary support (4), and when the secondary infrared receiver (822) moves to the middle position of the secondary support (4) along with the secondary mounting block (61), the infrared optical fiber emitted by the secondary infrared emitter (821) vertically shoots at the secondary infrared receiver (822);
and infrared position sensors (82) on the primary support (3) and the secondary support (4) are electrically connected with the closed-loop controller (83).
5. The scraping device of the printing machine according to claim 4, wherein: two infrared distance sensors (81) are arranged on the primary support (3), primary infrared receivers (812) of the two infrared distance sensors (81) on the primary support (3) are respectively arranged at two ends of the primary support (3) in the length direction, and infrared transmitters of the two primary infrared distance sensors (81) on the primary support (3) are respectively arranged at two sides of the primary mounting block (51);
infrared distance sensor (81) are provided with two on secondary support (4), one-level infrared receiver (812) of two infrared distance sensor (81) on secondary support (4) set up respectively at secondary support (4) length direction's both ends, one-level infrared transmitter (811) of two infrared distance sensor (81) on secondary support (4) set up respectively in the both sides of second grade installation piece (61).
6. The scraping device of the printing machine according to claim 2, wherein: the infrared distance sensor (81) further comprises a limit stop (813), the limit stop (813) is arranged on the first-stage mounting block (51) and the second-stage mounting block (61), the limit stop (813) is arranged close to the first-stage infrared emitter (811), two ends of the first-stage support (3) and the second-stage support (4) are respectively provided with a mounting panel (31) used for fixing the first-stage infrared receiver (812), when the limit stop (813) moves to two end positions of the first-stage support (3) along with the first-stage mounting block (51), the limit stop (813) is abutted to the mounting panel (31), and a gap exists between the first-stage infrared emitter (811) and the first-stage infrared receiver (812);
when the limit stop (813) moves to the two ends of the secondary support (4) along with the secondary mounting block (61), the limit stop (813) is abutted to the mounting panel (31) and a gap exists between the primary infrared transmitter (811) and the primary infrared receiver (812).
7. The scraping device of the printing machine according to claim 1, wherein: one end of the first-level support (3) is provided with an installation bin (32), the first-level driving motor (33) is arranged in the installation bin (32), the first-level chain wheel transmission structure (5) comprises a driving synchronous wheel (52) and a driven synchronous wheel (53), the driving synchronous wheel (52) is arranged close to the installation bin (32), a synchronous chain (54) is connected between the driving synchronous wheel (52) and the driven synchronous wheel (53), a power shaft (55) penetrates through the driving synchronous wheel (52), a transmission gear (551) is fixedly arranged on the power shaft (55), a driving gear (331) is arranged on the first-level driving motor (33), and the driving gear (331) and the driven gear are meshed with each other.
8. The scraping device of the printing machine according to claim 7, wherein: the side wall of the installation bin (32) is provided with a heat dissipation opening, and a heat dissipation metal mesh is attached to the heat dissipation opening.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021363031.0U CN213007056U (en) | 2020-07-11 | 2020-07-11 | Scraping and printing device of printing machine |
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| CN202021363031.0U CN213007056U (en) | 2020-07-11 | 2020-07-11 | Scraping and printing device of printing machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113232417A (en) * | 2021-05-08 | 2021-08-10 | 江苏证隆机械有限公司 | Spraying decoration machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113232417A (en) * | 2021-05-08 | 2021-08-10 | 江苏证隆机械有限公司 | Spraying decoration machine |
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