CN101181839B - Automatic screen printer - Google Patents

Abstract

The invention discloses a screen printer used for printing fabrics, in particular to an automatic screen printer. The invention comprises a stander, a fabric transmission system, a screen printing frame, and an electrical appliance-control box. The screen printing frame comprises a mainbody frame and a lifting device which controls the mainbody frame to ascend and descend; one side surface of the mainbody frame is articulated with one side of the stander; the bottom of the mainbody frame is provided with a screen printing membrane; the lifting device is arranged at the other end of the stander; the invention is characterized in that the mainbody frame is provided with a linear guideway; a squeegee dolly driven by a driving device and used for printing the fabrics is arranged on the linear guideway and right above the screen printing membrane. Owning to the squeegee dolly and the driving device arranged on the mainbody frame, the invention changes the printing operation which is required to be manually implemented in the prior art to the automatic implementation by machine, saving a plurality of manpower cost, effectively solving the problem of the prior art that the printing quality of the umbrella surface has low precision and improving the quality of the products and the production efficiency.

Description

A kind of automatic screen printer

Technical field

The present invention relates to a kind of lining printing machinery, specifically a kind of automatic screen printer.

Background technology

The silk-screen of umbrella cover adopts manual mode more at present.Be by hand-held wire frame of operative employee and cutter in early days, the umbrella cover printing process is finished in pure craft.Subsequently, a kind of semi-automatic silk-screen machine appears through improving, in this semi-automatic seal machine, the wire frame that is adopted comprises cantilever, rack mandrel, rack assembly, rack control device, described cantilever one end is fixed in the upper edge of frame one side, and the other end is coupling by the leg of described rack mandrel and rack assembly; Described rack control device is arranged on the frame opposite side, comprise and hard directly be fixed on foot pedal shell on the frame, pass the foot pedal shell and can make the pedal that slides up and down, be provided with extension spring between lower end, described foot pedal side and the foot pedal shell, described foot pedal upper end is connected with rack assembly free margins, and the lower end is treadle fixedly.

When using above-mentioned semi-automatic silk-screen machine to print, wait by machine by the hand-held cutter of operative employee.At this moment, because the effect of extension spring, the foot pedal jack-up rack assembly that makes progress.After stopping below conveyer belt is sent to lining wire frame, the operative employee depresses treadle, and the silk screen mould on the wire frame is contacted with lining, holds cutter printing then.Finish printing the relieving treadle, the rack assembly is back to original position, and lining is sent to next station, and the printing of a color just is through with.

Pure manual silk-screen with respect to early stage uses this semi-automatic silk-screen machine, and operative employee's only using foot is gently once stepping on sequence of operations such as having finished early stage placement, contraposition.Save the operating time, reduced operation easier.And, effectively raise aligning accuracy because it is fixed on wire frame on the frame.But its shop China ink and printing action still need manual finishing, and in this process, problem such as the inequality of manual shop China ink and hand-printing pressure are inconsistent has directly influenced the printing quality of lining.And in human cost higher today, the too much use to human resources has brought a large amount of costs.This is unfavorable for that very manufacturing enterprise develops and shape is big in the market competition environment of current sharp row.

Summary of the invention

What the present invention will solve is the existing above-mentioned deficiency of existing screen printer, and a kind of follow-on screen printer is provided, and is intended to realize the automatic printing of lining, to improve efficient, quality and the cost of lining printing.

The technical scheme that addresses the above problem employing is: a kind of automatic screen printer, frame are provided with lining transfer system, wire frame, reach electric appliance control box.Described wire frame comprises the lowering or hoisting gear of main body frame and the lifting of control main body frame, described main body frame one side is hinged on a side of frame, its bottom is provided with the silk screen mould, described lowering or hoisting gear is arranged on the opposite side of frame, it is characterized in that described main body frame is provided with line slideway, one is arranged on described line slideway by drive unit being used for of driving to the seal dolly of drawing together that lining prints, and be positioned at the silk screen mould directly over.Described electric appliance control box is used to control the fortune of each power set of automatic screen printer of the present invention and stops.

The described seal dolly top of drawing together is provided with cutter lifting suction magnet and withdrawing suction magnet, and the middle part is provided with a blade row axle by sliding bearing.The cutter lifting that studs with permanent-magnet steel on being fixed with on the described blade row axle is inlayed the magnet steel steel plate, is drawn together and print blade row, doctor row.Described drawing together printed blade row and doctor row setting down, can contact silk screen mould surface bottom.Described permanent-magnet steel is inhaled between magnet and the withdrawing suction magnet at cutter lifting.On the described main body frame draw together the rising of seal dolly impulse stroke, stop bit is put to be respectively equipped with and is drawn together black lance and draw together the seal lance.The described seal of drawing together is fixed with on the dolly respectively with described and draws together black lance and draw together that the seal lance is corresponding to be drawn together black collision block and draw together the seal collision block.Here, the present invention has realized drawing together the automatic tool changer of seal dolly by adopting the lance and the mode of collision block pushing tow, makes to draw together the seal dolly and taken into account printing simultaneously and drawn together black two kinds of functions, makes printing process carry out automatically continuously.This implementation is simple in structure, produces, installation process is simple and easy.

The described drive unit of drawing together the seal dolly comprises motor, the reduction gear box that is arranged on the main body frame side, adopt the band transmission between described motor and the reduction gear box, the reduction gear box output is provided with synchronous band driving wheel, described main body frame opposite side is provided with and is with synchronously the corresponding synchronous band driven pulley of driving wheel, is with synchronous band on described synchronous band driving wheel and the synchronous band driven pulley.Described synchronous subzonal layer band is fixed on to be drawn together on the seal dolly.Motor rotates after slowing down and reaches synchronous band, makes it to drive dolly and moves the do printing or draw together the China ink action on line slideway.Motor work is controlled automatically by Circuits System in the electric appliance control box.Adopt this structure, make the printing action finish automatic control.

The described little roof of seal of drawing together also is provided with a limiting plate, main body frame top respectively draw together the rising of seal dolly impulse stroke, stop bit installs corresponding with described limiting plate draw together China ink braking normally closed switch and draw together and print moving normally closed switch.Above-mentioned two normally closed switch are used to controlling the motor outage.After drawing together seal dolly finishes an operation, just can touch above-mentioned normally closed switch motor is quit work.Make by this device and to draw together the seal dolly and realized that accurate stroke controls automatically.

Described lowering or hoisting gear comprises motor, worm gear case, lift cam, reaches control device, pass through the band transmission between described motor and the worm gear case, described lift cam is arranged on the output of described worm gear case, and described main body frame and corresponding position, lift cam edge are provided with the lifting fulcrum.Rotated by the Motor Drive lift cam, the variation of lift cam radius is converted into the rise of the movable side of main body frame and the control of landing by the lifting fulcrum.

Described apparatus for controlling of lifting comprises support, nylon plug, outer tube, cylindrical compression spring, plug, supporting plate.Described supporting plate is positioned at support bottom, described plug lower end is fixed on the supporting plate with nut, its outside is with inner sleeve, be provided with the compressive state cylindrical compression spring between described plug and the inner sleeve, described outer tube is enclosed within the outside of inner sleeve, its fastening nylon plug suitable for reading, lower middle fixed-site collision block, the upper and lower of described collision block respectively are provided with the normally closed microswitch of control motor stall.The part that described nylon plug lower plane is positioned at outer tube inside is pressed the cylindrical compression spring upper end, and described nylon plane beyond the Great Wall is close to below the main body frame lower right corner.Described two normally closed microswitch lines touch this switch at electric appliance control box, and electric appliance control box can make the motor outage of lowering or hoisting gear.And then realize of the adjusting of this device to the main body frame adjustable height.

Described main body frame bottom is provided with the silk-screen housing, and described silk-screen housing inside is provided with dismountable silk-screen inside casing, and described silk screen mould is arranged on described silk-screen inside casing inside.

Described wire frame is equidistant setting on frame, and its quantity is decided by printing lining chromatography quantity, is generally four to seven.

The present invention draws together seal dolly and drive unit thereof by being provided with on the main body frame of wire frame, finish automatically needing the manual printing work of finishing to be improved to machine in the prior art.When adopting existing semi-automatic silk-screen machine to produce, because a wire frame side needs to arrange an operative employee to finish the printing action at least, be printed as example with seven chromatography umbrella covers, desire realizes production continuously, then needs at least seven skilled printing operation workers.Add oil one of worker of two of feeding workers, one of blanker, check, need at least ten workmans altogether.If use automatic screen printer production of the present invention instead, because the printing action finished automatically by machine, a whole set of program only needs that four workmans of wet goods get final product in feeding, blanking, the check.As seen, application of the present invention has reduced the use of human resources in the production process conscientiously, provides cost savings greatly, and it will be more obvious that this beneficial effect embodies in umbrella cover is produced in enormous quantities.In addition, because the characteristics of the hi-Fix of machine action, application of the present invention also efficiently solves the not high problem of umbrella cover printing quality precision in the prior art, has improved product quality and production efficiency.

As a further improvement on the present invention, described lifting fulcrum lower end can be provided with at least one groove ball bearing.The sliding friction of lift cam edge and lifting fulcrum is transferred to rolling friction.This promptly can improve the operating efficiency of drive unit, also can reduce the wearing and tearing between parts.Can prolong the service life of equipment.

As a further improvement on the present invention, the motor of described lowering or hoisting gear and worm gear case are separately positioned on motor mounting plate and are fixed on the worm gear case mount pad on the frame, described motor mounting plate is hinged on below the worm gear case mount pad on one side, is provided with adjustment screw between below another side and the worm gear case mount pad.Described adjustment screw is in order to regulate the tensioner degree of motor output end driving-belt, to reach better control effect.

Description of drawings

The invention will be further described below in conjunction with drawings and Examples.

Fig. 1 is a general structure schematic diagram of the present invention.

Fig. 2 is the vertical view of Fig. 1.

Fig. 3 is the structural representation of wire frame of the present invention.

Fig. 4 is that the B-B of Fig. 3 is to profile.

Fig. 5 is that the A-O-O-A of Fig. 3 is to profile.

Fig. 6 is that the present invention draws together seal drive car schematic diagram.

Fig. 7 is that the C-C of Fig. 4 is to profile.

Fig. 8 is a wire frame lowering or hoisting gear schematic diagram of the present invention.

Fig. 9 is a wire frame apparatus for controlling of lifting schematic diagram of the present invention.

Figure 10 is the left view of Fig. 9.

Figure 11 is the partial enlarged drawing at Fig. 9 circle Q place.

The specific embodiment

With reference to Fig. 1, Fig. 2, the semi-automatic dyeing machine of the present invention comprises frame 4, be layed in the work top 14 above the frame, wire frame 3, the head and the tail two ends of described frame 4 are respectively equipped with master roller 1 and tail roller 9, conveyer belt 15 that drives by master roller of suit on described master 1 and the tail roller 9, described conveyer belt 15 is upwards walked around tail roller 9 from frame 4 tail ends, be close to the head end that work top 14 extends to frame 4 then, walk around master roller 1 again, at last below work top 14 successively through three tensioner rollers 2,11, get back to the tail end closure of frame 4 behind 10 and 13 backhaul band wheel holding mechanisms 7, also evenly be provided with on the described conveyer belt 15 to be used to paste and wait that the stickup of printing lining 17 is with 13, described wire frame 3 equidistant work top 14 tops that are arranged on, its the place ahead is provided with ventilating fan 5, is provided with deep bead 6 near the back frame.Tail end in described frame 4 also is provided with a lining positioner 16, and described master roller 1 is driven by a motor 12 that is installed on frame 4 head end bottoms.

With reference to Fig. 3, Fig. 4, Fig. 5, described wire frame 3 comprises the lowering or hoisting gear 41 of main body frame 27 and 27 liftings of control main body frame, described main body frame 27 bottoms are silk-screen housing 34, its base, left side is hinged on the cantilever 52 in frame left side by mandrel 51, described lowering or hoisting gear 41 is arranged on the right side of frame, described silk-screen housing 34 inside are fixed with silk-screen inside casing 33 by eight trip bolts 35, and described silk-screen inside casing 33 inside are equipped with silk screen mould 87.When wire frame 3 drops to extreme lower position, described silk screen mould 87 be close to place on the work top 14 wait to print lining 17.Described silk-screen inside casing 33 tops are outstanding establishes one and draws together seal dolly 23.Described main body frame 27 sides are provided with control and draw together seal dolly 23 parallel mobile drive units.

Described silk-screen housing 34 galianconism two sides connect a top panel 29 by 4 principal posts 32, and by bolting, top panel 29 lower surfaces are equipped with 26 2 of line slideways by lead rail axis supporting base 19 between principal post 32 and the top panel 29.Described two line slideways 26 respectively are inserted in 59 two of ball bushings that have supporting base 24.

Describedly draw together that four jiaos on plane is screwed with ball bushing supporting base 24 lower planes on the seal dolly 23, the described seal dolly 23 of drawing together can move around about on the line slideway 26 neatly.Described drawing together is oppositely arranged cutter lifting suction magnet 21, withdrawing suction magnet 22 about seal dolly 23 tops, lower plane is equipped with 65 2 on sliding bearing, seal in 64 1 on blade row axle in the middle of the described sliding bearing, the cutter lifting edge magnet steel steel plate 63 that a upper end studs with permanent-magnet steel 62 is fixed in blade row axle 64 centre positions, fixing doctor row 48 on the blade row axle of described two sliding bearing 65 inboards fixedly draws together on the blade row axle of the outside and prints blade row 58.Magnet 21 is inhaled at cutter lifting by edge permanent-magnet steel 62 places, described cutter lifting edge magnet steel steel plate 63 upper ends, withdrawing is inhaled between the magnet 22, and lower end 49 extends to doctor and arranges the place ahead, 48 left side and become and draw together black collision block.

The original position of drawing together seal dolly right lateral in described top panel 29 inboards installs that a following terminal contacts 50 and cutter lifting edge magnet steel steel plate 63 lower ends 49 are corresponding draws together black lance 20; Draw together seal dolly right lateral final position in described top panel 29 inboards and install one and draw together seal lance 30, describedly draw together that seal the place ahead, blade row 58 right side is provided with and described 30 times terminal contacts of seal lance, the 47 corresponding seal collision blocks 25 of drawing together of drawing together.

With reference to Fig. 6, the described drive unit of drawing together seal dolly 23 comprises motor 54, the reduction gear box 68 that is arranged on main body frame 27 sides, and described reduction gear box 68 is installed in the middle of wire frame 3 left end silk-screen housings 34 transverse arms.Its downside is provided with a gap bridge axle 66 by deep groove ball bearing, described gap bridge axle 66 left ends are fixed by nut, right-hand member is installed pinion 69, driven pulley 56 successively, described reduction gear box 68 upsides are installed a synchronous wheel shaft 67 that is used to drive synchronously with 28 by deep groove ball bearing, described synchronous wheel shaft 67 left ends are loaded onto synchronous band driving wheel 18 usefulness nuts and are fixed, and right-hand member is loaded onto gear wheel 57 usefulness nuts and fixed.Described motor 54 is installed below the described reduction gear box 68, driving pulley 53 is installed on the motor output shaft, fix, connect with glue belt 55 between driving pulley 53 and the driven pulley 56 with flat key.Synchronous band driven pulley support is equipped with in described main body frame 27 right-hand member top panel inboards, and logical three deep groove ball bearings of described synchronous band driven pulley support and a shaft screw install one and be with driven pulley 31 synchronously.

Describedly be with 28 1 ends to be screwed synchronously to draw together seal dolly 23 lower planes, the other end is walked around earlier synchronous band driving wheel 18 left, extend to synchronous band driven pulley 31 more to the right, walk around to extend left behind the synchronous band driven pulley 31 to get back to and draw together seal dolly 23 lower planes with overlapping with 28 origin or beginning synchronously.In said structure, the positive and negative rotations of motor 54 drive is with 28 to move back and forth in the horizontal direction synchronously, and then drives and draw together seal dolly 23 left and right moving on line slideway 26, draws together the seal dolly and just can finish printing and draw together the China ink action.

With reference to Fig. 7, a microswitch mounting bar 72 is equipped with in described wire frame top panel 29 inboards, on microswitch mounting bar 72, draw together seal dolly right lateral original position corresponding position and install and draw together China ink braking normally closed switch 70, install to draw together and print moving normally closed switch 73 drawing together seal dolly right lateral final position corresponding position.Print the plane position installation limiting plate 71 corresponding on the dolly lower shoe described drawing together with above-mentioned two microswitches.

Be moved to the left stroke left side end points when drawing together seal dolly 23 by motor 54 drivings, the limiting plate 71 of drawing together seal dolly 23 touches to draw together to print and moves normally closed switch 73, and 23 stop of seal dolly are drawn together in motor 54 stalls.Prolong counter-rotating actuating motor 54 through one section, draw together the seal dolly and move right, when getting back to stroke right side end points, the limiting plate 71 of drawing together seal dolly 23 touches draws together China ink braking normally closed switch 70, and motor 54 stall is once more drawn together seal dolly 23 and prepared to enter circulation next time and move.

With reference to Fig. 8, Fig. 9, Figure 10, the lowering or hoisting gear 41 of described main body frame comprises motor 45, worm gear case 39, lift cam 38, reaches control device 76, described worm gear case 39 is arranged on the worm gear case installing rack 42, be positioned at the position of center, main body frame 27 the right correspondence on frame 4 the right steelframes, its output 40 is installed described lift cam 38, is provided with lifting fulcrum 36 with corresponding section, described lift cam 38 edge on the described main body frame 27.Groove ball bearing 37 is equipped with in described lifting fulcrum 36 lower ends, and described groove ball bearing 37 is pressed on described lift cam 38 edges.A hinged motor mounting plate 43 below the described worm gear case installing rack 42, described motor 45 is arranged on below the described electronic installing plate 43, and an adjustment screw 46 is set between the free end 44 of described motor mounting plate 43 and the worm gear case installing rack 42.Adopt the glue belt transmission between described worm gear case 39 inputs 74 and motor 45 outputs 75.

Described control device 76 is arranged on the steelframe of methods, rack under the transverse arm right corner of lifting fulcrum 36.It comprises support 82, nylon plug 77, outer tube 79, cylindrical compression spring 78, plug 81, supporting plate 83.Described supporting plate 83 is positioned at support 82 bottom, and described plug 81 lower ends are fixed on the supporting plate 83 with nut, and its outside is with inner sleeve 80.Be provided with compressive state cylindrical compression spring 78 between described plug 81 and the inner sleeve 80, described outer tube 79 is enclosed within the outside of inner sleeve 80, its fastening nylon plug 77 suitable for reading, lower middle fixed-site collision block 85, the upper and lower of described collision block 85 are respectively installed a normally closed microswitch 84,86 on support.The part that described nylon plug 77 lower planes are positioned at outer tube 79 inside is pressed cylindrical compression spring 78 upper ends, and plane is close to below main body frame 27 lower right corner on it.When main body frame 27 rises, described outer tube 79 under cylindrical compression spring 78 elastic force effects along with rise, driving collision block 85 simultaneously moves upward, when touching, collision block 85 promotes braking normally closed switch 84, motor 45 outages, lift cam 38 stalls, main body frame 27 stops to rise, when motor 45 antiports, the beginning of lift cam periphery changes from high to low, and main body frame 27 slowly descends, promoting outer tube 79 simultaneously descends, when touching the braking normally closed switch 86 that descends, collision block 85 makes it to disconnect, motor 45 outages, and main body frame 27 stops to descend.

Wire frame printing work process of the present invention is as follows:

The first step, wire frame 3 drops to extreme lower position, and silk screen mould 87 was close to and was waited to print lining 17 this moment, describedly drew together 23 freeze-frames of seal dolly in the left lateral original position, and doctor row 48 breaks away from silk screen moulds 87, draws together seal blade row 58 and is in and draws together the seal position.Actuating motor 54 is just changeing, and power is by driving-belt 55, reduction gear box 69, be with 28 to drive and draw together seal dolly 23 and move as straight line left synchronously, and the seal blade row of drawing together on the seal dolly 58 drawn together begins to draw together the lining work of dying.Treat that the described seal dolly 23 of drawing together moves to and draws together the final position of printing and distribute journey, draw together limiting plate 71 on the seal dolly and disconnect drawing together and print moving normally closed switch 70 that motor 54 outage stalls are drawn together seal dolly 23 and stopped to move.Simultaneously, cutter lifting edge magnet steel steel plate 63 touches the contact 50 of ink knife lance 20, and cutter lifting edge magnet steel steel plate 63 drives doctor row 48, draws together angle of seal blade row 58 counter-clockwise swings under ink knife lance 20 thrusts.Draw together seal blade row 58 this moment and break away from silk screen mould 87, doctor row 58 is in and draws together China ink dress shape.The magnet steel of cutter lifting edge magnet steel steel plate upper end 62 effectively is adsorbed on withdrawing and inhales on the magnet 21.Drawing together the seal process finishes.

Second step, under the control of the circuit of electric appliance control box behind transient delay counter-rotating actuating motor 54, drive and draw together seal dolly 23 and move as straight line to the right, the doctor row 48 who draws together on the seal dolly draws together printing ink above the full silk screen mould 87 equably in order to printing and dyeing next time.Actuating motor 45 is just changeing simultaneously, and power upwards promotes lifting fulcrum 36 by driving-belt, worm gear case 39, lift cam 38, and main body frame slowly rises.

Move back to and draw together the seal original position when drawing together seal dolly 23, on the one hand, draw together limiting plate 71 on the seal dolly and disconnect drawing together and print moving normally closed switch 73, motor 54 outage stalls, dolly stops to move.On the other hand, collision block 85 touches braking normally closed switch 84 on the apparatus for controlling of lifting, motor 45 outage stalls, and lift cam 38 stalls, main body frame 27 stops to rise.Simultaneously, seal cutter collision block 25 touches seal cutter lance contact 47, drives and draws together seal blade row 58, doctor row 48 angle of swing clockwise, makes doctor row 48 break away from silk screen moulds 87, draws together seal blade row 58 and is rocked to and draws together the seal position.Cutter lifting edge magnet steel steel plate 63 also returns to the home position, and the magnet steel of upper end replaces attached suction on cutter lifting suction magnet 22.

Under the control of the circuit of electric appliance control box through transient delay counter-rotating actuating motor 45, drive lift cam 38 reverse rotations, wire frame 3 is slowly fallen, abut in until silk screen mould 87 and to wait to print lining 17, the collision block 85 of apparatus for controlling of lifting 76 touches the braking normally closed switch 86 that descends, motor 45 outage stalls.This moment, all workpiece were prepared just continuous to treat starting motor 54 beginning subsequent printings.

What should be understood that is: the foregoing description is just to explanation of the present invention, rather than limitation of the present invention, and any innovation and creation that do not exceed in the connotation scope of the present invention all fall within protection scope of the present invention.

Claims (9)

1. automatic screen printer, frame (4) is provided with the lining transfer system, wire frame (3), control the electric appliance control box that each power set fortune is stopped, described wire frame (3) comprises the lowering or hoisting gear (41) of main body frame (27) and the lifting of control main body frame, described main body frame (27) one sides are hinged on a side of frame (4), described main body frame (27) bottom is provided with silk screen mould (87), described lowering or hoisting gear (41) is arranged on the opposite side of frame (4), it is characterized in that described main body frame (27) is provided with line slideway (26), one is arranged on described line slideway (26) by drive unit being used for of driving to the seal dolly (23) of drawing together that lining prints, and be positioned at silk screen mould (87) directly over.

2. a kind of automatic screen printer according to claim 1, it is characterized in that described seal dolly (23) top of drawing together is provided with cutter lifting suction magnet (21) and withdrawing suction magnet (22), the middle part is provided with a blade row axle (64), stud with the cutter lifting edge magnet steel steel plate (63) of permanent-magnet steel (62) on being set with on the described blade row axle (64), draw together seal blade row (58), doctor row (48), described permanent-magnet steel (62) is positioned at cutter lifting and inhales between magnet (21) and the withdrawing suction magnet (22), described main body frame (27) is gone up drawing together seal dolly (23) impulse stroke and is risen, stop bit is put to be respectively equipped with and is drawn together black lance (20) and draw together seal lance (30), described draw together to be fixed with on seal dolly (23) respectively with described draw together black lance (20) and draw together that seal lance (30) is corresponding to be drawn together black collision block (49) and draw together and print collision block (25).

3. a kind of automatic screen printer according to claim 1, it is characterized in that the described driving device of drawing together seal dolly (23) comprises the motor (54) that is arranged on main body frame (27) side, reduction gear box (68), adopt the band transmission between described motor (54) and the reduction gear box (68), the reduction gear box output is provided with synchronous band driving wheel (18), described main body frame (27) opposite side is provided with and is with the corresponding synchronous band driven pulley (31) of driving wheel (18) synchronously, be with synchronous band (28) on described synchronous band driving wheel (18) and the synchronous band driven pulley (31), described synchronous band (28) lower floor band is fixed on to be drawn together on the seal dolly (23).

4. a kind of automatic screen printer according to claim 1, it is characterized in that described seal dolly (23) top of drawing together is provided with a limiting plate (71), described main body frame (27) is put to be respectively equipped with and corresponding with described limiting plate (71) is drawn together China ink braking normally closed switch (70) and draw together printing and move normally closed switch (73) drawing together the rising of seal dolly (23) impulse stroke, stop bit.

5. a kind of automatic screen printer according to claim 1, it is characterized in that described lowering or hoisting gear (41) comprises motor (45), worm gear case (39), lift cam (38), reaches apparatus for controlling of lifting (76), adopt the band transmission between described motor (45) and the worm gear case (39), lift cam (38) is arranged on the output (40) of worm gear case (39), and described main body frame (27) is provided with lifting fulcrum (36) with lift cam (38) corresponding position, edge.

6. a kind of automatic screen printer according to claim 5, it is characterized in that described apparatus for controlling of lifting (76) comprises support (82), nylon plug (77), cylindrical compression spring (78), outer tube (79), inner sleeve (80), plug (81), supporting plate (83), described supporting plate (83) is positioned at support (82) bottom, described plug (81) lower end is fixed on the supporting plate (83) with nut, its outside is with inner sleeve (80), be provided with compressive state cylindrical compression spring (78) between described plug (81) and the inner sleeve (80), described outer tube (79) is enclosed within the outside of described inner sleeve (80), its fastening nylon plug suitable for reading (77), the lower middle fixed-site has collision block (85), on the described collision block (85), the below respectively is provided with the normally closed microswitch (84 of a control motor (45) stall, 86), described nylon plug (77) lower plane is positioned at the inner part of outer tube (79) and presses cylindrical compression spring (78) upper end, and plane is close to below main body frame (27) lower right corner on it.

7. a kind of automatic screen printer according to claim 5 is characterized in that described lifting fulcrum (36) lower end is provided with groove ball bearing (37).

8. a kind of automatic screen printer according to claim 5, it is characterized in that the motor (45) of described lowering or hoisting gear (41) and worm gear case (39) are separately positioned on motor mounting plate (43) and are fixed on the worm gear case mount pad (42) on the frame, one side of described motor mounting plate (43) be hinged on worm gear case mount pad (42) below, be provided with adjustment screw (46) between another side (44) and worm gear case mount pad (42) following.

9. according to each described a kind of automatic screen printer among the claim 1-8, it is characterized in that described main body frame (27) bottom is provided with silk-screen housing (34), described silk-screen housing (34) inside is provided with dismountable silk-screen inside casing (33), and described silk screen mould (87) is arranged on described silk-screen inside casing (33) inside.

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