CN213734002U - Paper board limiting mechanism for screen printing machine - Google Patents

Abstract

The utility model relates to a cardboard stop gear for silk screen printing machine, it is including being used for setting up the thing platform of holding on the workstation of silk screen printing machine body, slide and set up the first baffle of holding the thing bench and slide and set up the second baffle of holding the thing bench, it is used for bearing the cardboard to hold the thing platform, the slip direction mutually perpendicular of first baffle and second baffle, it is equipped with the first adjusting part that the first baffle of drive slided to the cardboard direction respectively to hold the thing bench, the second adjusting part that the drive second baffle slided to the cardboard direction, it is formed with cardboard location space to enclose between the relative lateral wall of first baffle and second baffle to close. This application has fast to the cardboard location, has improved printing efficiency's effect.

Description

Paper board limiting mechanism for screen printing machine

Technical Field

The application relates to the field of screen printing machines, in particular to a paperboard limiting mechanism for a screen printing machine.

Background

The screen printing machine is a machine for printing by using a screen printing plate, and can be classified into a flat screen printing machine, a curved screen printing machine, a rotary screen printing machine and the like, wherein the flat screen printing machine is a method for printing on a flat printing stock by using the flat screen printing plate.

When the screen printing machine in the related technology is actually used, printed characters and images are made into a printing plate and are arranged on the printing machine, a paper board to be printed is placed on a workbench of the printing machine, then gummed paper is manually pasted on the workbench, the gummed paper is arranged around the circumferential direction of the paper board and can limit the position of the paper board, and the paper board is matched with the printing plate; and then the printing plate moves downwards, the paper board is pressed and fixed on a workbench, finally, a proper amount of UV matte silk-screen gloss oil is put on the printing plate manually or by a machine, a squeegee on a printing machine moves, and then the UV matte silk-screen gloss oil is indirectly transferred onto the paper board until a printed matter which is the same as the printing plate is printed.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: when actual printing, need print in batches to the cardboard of different dimensions, when the cardboard printing to different dimensions, need the manual work to tear and paste original adhesive tape on the workstation, measure according to the cardboard size again and cut the adhesive tape, paste the adhesive tape in suitable position again, owing to adopt the manual work to cut and paste the adhesive tape and need consume certain time, reduced printing efficiency.

SUMMERY OF THE UTILITY MODEL

The utility model provides a cardboard stop gear for silk screen printing machine for improve artifical volume cut offset paper consuming time and influence the problem of printing efficiency.

The application provides a cardboard stop gear for silk screen printing machine adopts following technical scheme:

the utility model provides a cardboard stop gear for silk screen printing machine, including being used for setting up the thing platform of holding on the workstation of silk screen printing machine body, slide and set up the first baffle on the thing platform of holding and slide and set up the second baffle on holding the thing platform, it is used for the bearing cardboard to hold the thing platform, the slip direction mutually perpendicular of first baffle and second baffle, it is equipped with the first adjusting part that the first baffle of drive slided to the cardboard direction, drives the second adjusting part that the second baffle slided to the cardboard direction respectively to hold the thing bench, enclose between the relative lateral wall of first baffle and second baffle and close and be formed with cardboard location space.

By adopting the technical scheme, according to the size specification of the paperboard, the first adjusting component is utilized to drive the first baffle plate to slide to a proper position along the length direction of the paperboard, the second adjusting component is utilized to drive the second baffle plate to slide to a proper position along the length direction of the paperboard, then the paperboard is placed on the object bearing table, so that the long side wall of the paperboard abuts against the side wall of the second baffle plate, the short side wall of the paperboard abuts against the side wall of the first baffle plate, and the positioning of the paperboard is further realized; by adopting the limiting mode, the operation is simple, the gummed paper is not required to be cut by manual labor, the time is saved, and the printing efficiency is improved.

Optionally, the first adjusting component comprises a first screw rod and a first sliding block in threaded connection with the first screw rod, a first sliding groove is formed in the upper surface of the object bearing platform and in the length direction of the paper board, the first screw rod is rotatably arranged in the first sliding groove, one end of the first screw rod extends out of the side wall of the object bearing platform and is connected with a first handle, the first sliding block slides in the first sliding groove, and the lower surface of the first baffle is arranged on the upper surface of the first sliding block.

By adopting the technical scheme, the first handle is rotated, and the first sliding chute plays a role in guiding and limiting the sliding of the first sliding block, so that the first sliding block is driven to slide in the first sliding chute, and the first baffle plate can be adjusted to a proper position along the length direction of the paper board according to the size specification of the paper board; the adjusting mode is simple in structure and convenient to operate.

Optionally, the second adjusting component comprises a second screw rod and a second sliding block in threaded connection with the second screw rod, the axial direction of the second screw rod is perpendicular to the axial direction of the first screw rod, a second sliding groove is formed in the upper surface of the object bearing table and in the width direction of the paper board, the second screw rod is rotatably arranged in the second sliding groove, one end of the second screw rod extends out of the side wall of the object bearing table and is connected with a second handle, the second sliding block slides in the second sliding groove, and the lower surface of the second baffle is arranged on the upper surface of the second sliding block.

By adopting the technical scheme, the second handle is rotated to drive the second screw rod to rotate, so that the second sliding block is driven to slide in the second sliding groove, the second baffle plate can be adjusted to a proper position along the width direction of the paper plate, and finally a positioning space for the paper plate is formed by enclosing the first baffle plate and the second baffle plate; the adjusting mode is simple in structure and convenient to operate.

Optionally, the two side walls of the object bearing table are respectively provided with a locking assembly for fixing the first handle and the second handle, the locking assembly comprises a magnetic ring, an arc-shaped iron block adsorbed on the inner annular wall of the magnetic ring, and a support rod connected with the inner arc wall of the arc-shaped iron block, the magnetic ring is respectively arranged on the two side walls of the object bearing table, the side walls of the first screw rod and the second screw rod are respectively provided with a through hole, and one end of the support rod, far away from the arc-shaped iron block, penetrates through the through hole and is connected with a limiting plate.

By adopting the technical scheme, when a person needs to rotate the first handle or the second handle, the limiting plate is pulled to drive the supporting rod to slide in the through hole, so that a certain space is reserved between the outer arc wall of the arc-shaped iron block and the inner ring wall of the magnetic ring, and the person can rotate the first handle or the second handle so as to adjust the positions of the first baffle and the second baffle; after adjusting first baffle and second baffle to suitable position, personnel promote the limiting plate for the gap between the outer arc wall of arc iron plate and the inner ring wall of magnetic ring reduces gradually, utilizes the suction of magnetic ring, can adsorb the stable inner ring wall at the magnetic ring of arc iron plate, has realized fixed the locking of the first in command and second handle, and then can fix first baffle and second baffle in suitable position.

Optionally, a spring is sleeved on the supporting rod, one end of the spring is connected with the inner annular wall of the arc-shaped iron block, and the other end of the supporting rod is connected with the side wall of the first handle or the side wall of the second handle.

Through adopting above-mentioned technical scheme, when personnel stopped rotating the first in command or the second in command, let go up the limiting plate, utilize the good elasticity restoring force of spring, drive branch gliding in the through-hole for the arc iron plate slides to the interior rampart direction of magnetic ring, and when the outer rampart of direct arc iron plate adsorbed on the interior rampart of magnetic ring, realized the quick fixation to the first in command and second in command.

Optionally, the two side walls of the first sliding block are both provided with a first wave sealing plate in an adhesive manner, one end, away from the first sliding block, of the first wave sealing plate is connected with the groove wall of the first sliding groove, the two side walls of the second sliding block are both provided with a second wave sealing plate in an adhesive manner, and one end, away from the second sliding block, of the second wave sealing plate is connected with the groove wall of the second sliding groove.

Through adopting above-mentioned technical scheme, first wave closing plate and second wave closing plate have good elasticity, first wave closing plate can be along with the sliding of first slider, first wave closing plate carries out the shutoff to the space between the lateral wall of first slider and the cell wall of first spout, and second wave closing plate can be along with the sliding of second slider, second wave closing plate carries out the shutoff to the space between the lateral wall of second slider and the cell wall of first spout, because first wave closing plate and second wave closing plate are the rubber material, certain sealed effect has, and then play sealed effect to first spout and second spout.

Optionally, the wave crest of the first wave sealing plate and the wave crest of the second wave sealing plate are located on the same horizontal line with the upper surface of the object bearing table.

Through adopting above-mentioned technical scheme, the upper surface that utilizes the thing platform of holding respectively with the crest of first wave closing plate, the crest of second wave closing plate is located same water flat line, make the cardboard place when holding the thing bench, the crest of first wave closing plate and the crest of second wave closing plate contradict at the lower surface of cardboard, the bearing area to the cardboard has been increased, make the printing plate compress tightly the cardboard when holding the thing bench, the notch that has reduced the cardboard and is located first spout, the lateral wall of the notch of second spout produces the possibility of indentation.

Optionally, the first slider and the second slider are both magnetic blocks, the first baffle and the second baffle are both iron plates, the first baffle is adsorbed on the upper surface of the first slider, and the second baffle is adsorbed on the upper surface of the second slider.

Through adopting above-mentioned technical scheme, because the magnetic path has certain magnetic force, can adsorb iron plate on the iron plate, and then realized dismantling between first slider and the first baffle and dismantling between second slider and the second baffle and be connected, the first baffle and the second baffle of corresponding specification are changed to the cardboard of convenience according to different thickness dimension specification.

Optionally, the thickness of the first baffle and the second baffle are smaller than the thickness of the paperboard.

Through adopting above-mentioned technical scheme, first baffle and second baffle thickness size all are less than the thickness size of cardboard for when printing plate moves down, can be stable compress tightly the cardboard on the thing platform.

In summary, the present application includes at least one of the following beneficial technical effects:

1. according to the size specification of the paperboard, the first adjusting assembly is utilized to drive the first baffle plate to slide to a proper position along the length direction of the paperboard, the second adjusting assembly is utilized to drive the second baffle plate to slide to a proper position along the length direction of the paperboard, then the paperboard is placed on the object bearing table, so that the long side wall of the paperboard abuts against the side wall of the second baffle plate, the short side wall of the paperboard abuts against the side wall of the first baffle plate, and the positioning of the paperboard is further realized;

2. the first handle is rotated, and the first sliding chute plays a role in guiding and limiting the sliding of the first sliding block, so that the first sliding block is driven to slide in the first sliding chute, and the first baffle plate can be adjusted to a proper position along the length direction of the paper board according to the size specification of the paper board;

3. when personnel stopped rotating the first in command or the second in command, let go up the limiting plate, utilize the good elasticity restoring force of spring, drive branch and slide in the through-hole for the arc iron plate slides to the inner ring wall direction of magnetic ring, when the outer rampart of direct arc iron plate adsorbs on the inner ring wall of magnetic ring, realized the quick fixation to the first in command and second in command.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.

Fig. 2 is a schematic structural diagram showing that the first baffle and the second baffle are located on the workbench in the embodiment of the present application.

Fig. 3 is a sectional view taken along line a-a of fig. 2.

Fig. 4 is an enlarged schematic view of a portion a of fig. 2.

Fig. 5 is a sectional view taken along line B-B in fig. 2.

Fig. 6 is an enlarged structural view of a portion B in fig. 5.

Fig. 7 is a sectional view taken along line C-C in fig. 2.

Fig. 8 is an enlarged structural view of a portion C in fig. 7.

Description of reference numerals: 1. a screen printer body; 2. a work table; 3. a material bearing platform; 4. a first baffle plate; 5. a second baffle; 6. a first adjustment assembly; 61. a first screw; 62. a first slider; 63. a first chute; 64. a first handle; 7. a second adjustment assembly; 71. a second screw; 72. a second slider; 73. a second chute; 74. a second handle; 8. a locking assembly; 81. a magnetic ring; 82. an arc-shaped iron block; 83. a strut; 84. a through hole; 85. a limiting plate; 86. a spring; 9. a first wave seal plate; 10. a second wave seal plate; 11. a first scale mark; 12. a first indicator line; 13. a second scale mark; 14. a second indicator line.

Detailed Description

The present application is described in further detail below with reference to figures 1-8.

The embodiment of the application discloses a cardboard stop gear for silk screen printing machine. Referring to fig. 1, the limiting mechanism comprises a carrying table 3 with a rectangular cross section, the carrying table 3 is used for being installed on a workbench 2 of a printer body, and a paperboard to be printed is placed on the upper surface of the carrying table 3.

Referring to fig. 2, a first baffle 4 and a second baffle 5 are respectively arranged on the upper surface of the object bearing platform 3 in a sliding manner, the sliding directions of the first baffle 4 and the second baffle 5 are mutually vertical, the length direction of the first baffle 4 is the same as the width direction of the paper board, and the length direction of the first baffle 4 is the same as the length direction of the paper board; the positions of the paper boards are positioned by the arrangement of the first baffle plate 4 and the second baffle plate 5, in the embodiment, the thickness of the first baffle plate 4 and the thickness of the second baffle plate 5 are both smaller than that of the paper boards, so that the paper boards can be stably pressed on the upper surface of the object bearing table 3 when the printing plate moves downwards.

Referring to fig. 2, a first adjusting assembly 6 for driving a first baffle 4 to slide towards the direction of a paper board is arranged on a bearing table 3, a second adjusting assembly 7 for driving a second baffle 5 to slide towards the direction of the paper board is arranged on the bearing table 3, the first baffle 4 and the second baffle 5 are adjusted to proper positions by using the first adjusting assembly 6 and the second adjusting assembly 7 according to the size specification of the paper board, so that a positioning space for the paper board is formed by enclosing the first baffle 4 and the second baffle 5, the paper board is directly placed in the positioning space before printing, the short side wall of the paper board is abutted against the side wall of the first baffle 4, the long side wall of the paper board is abutted against the side wall of the second baffle 5, and the positioning of the paper board is realized; by adopting the limiting mechanism, the gummed paper does not need to be cut manually, time and labor are saved, and the printing efficiency is improved.

Referring to fig. 2, the upper surface of the object bearing table 3 is provided with first scale marks 11, the length direction of the first scale marks 11 and the sliding direction of the first baffle 4 are in the same direction, the side wall of the first baffle 4 is provided with a first indicating line 12 matched with the first scale marks 11, and when a person adjusts the sliding of the first baffle 4, the person can quickly adjust the first baffle 4 to a proper position according to the size specification of the paperboard and the first scale marks 11, so that the operation is convenient and fast.

The upper surface of the object bearing table 3 is provided with second scale marks 13, the extending direction of the second scale marks 13 and the sliding direction of the second baffle 5 are in the same direction, the side wall of the second baffle 5 is provided with second indication lines 14 corresponding to the second scale marks 13, the first indication lines 12 and the second scale marks 13 are matched, the second paperboard can be quickly adjusted to a proper position according to the size specification of the paperboard, and the operation is convenient and fast.

Referring to fig. 3 and 4, the first adjusting assembly 6 includes a first screw 61, an axial direction of the first screw 61 is the same as a length direction of the paper board, a first sliding block 62 is connected to the first screw 61 in a threaded manner, a first sliding slot 63 is formed in an upper surface of the object bearing table 3 along the axial direction of the first screw 61, the first sliding block 62 slides in the first sliding slot 63, one end of the first screw 61 is rotatably connected to a slot wall of the first sliding slot 63, the other end of the first screw 61 extends out of a side wall of the object bearing table 3 and is connected to a first handle 64, the first handle 64 is used for a person to rotate the first screw 61, the first sliding slot 63 limits and guides the sliding of the first sliding block 62 to drive the first sliding block 62 to slide in the first sliding slot 63, a lower surface of the first baffle 4 is mounted on the upper surface of the first sliding block 62 to drive the first baffle 4 to slide synchronously, and further according to the size of the paper board, the first shutter 4 can be adjusted to a suitable position.

Referring to fig. 5 and 6, the adjusting assembly includes a second screw rod 71, the axial direction of the second screw rod 71 is the same as the length direction of the paper board, a second sliding slot 73 for accommodating the second screw rod 71 is arranged on the upper surface of the object bearing table 3, a second slider 72 sliding in the second sliding slot 73 is connected to the second screw rod 71 in a threaded manner, one end of the second screw rod 71 is rotatably connected to one side slot wall of the second sliding slot 73 adjacent to the slot opening thereof, the other end of the second screw rod 71 extends out of the side wall of the object bearing table 3, a second handle 74 is fixedly connected to one end of the object bearing table 3, so as to facilitate the rotation of the second screw rod 71 by a person, the second slider 72 is driven to slide in the second sliding slot 73 due to the guiding and limiting effects of the second sliding slot 73 on the second slider 72, the lower surface of the second baffle 5 is mounted on the upper surface of the second slider 72, and the second baffle 5 can slide synchronously with the second slider 72, and then the second baffle 5 can be adjusted to a proper position according to the size of the paperboard.

Referring to fig. 4 and 6, because the thickness of paper differs, in this embodiment, first slider 62 and second slider 72 are magnetic blocks, and first baffle 4 and second baffle 5 are iron plates, utilize the suction of first slider 62 and second slider 72, can adsorb first baffle 4 at the upper surface of first slider 62, can adsorb second baffle 5 at the upper surface of second slider 72 simultaneously, and then conveniently according to the thickness of paper, change the first baffle 4 and the second baffle 5 of suitable thickness dimension specification.

Referring to fig. 4 and 6, both side walls of the first sliding block 62 are adhered with a first wave sealing plate 9, one end of the first wave sealing plate far away from the first sliding block 62 is connected with the groove wall of the first sliding groove 63, both side walls of the second sliding block 72 are adhered with a second wave sealing plate 10, one end of the second wave sealing plate 10 far away from the second sliding block 72 is connected with the groove wall of the second sliding groove 73, both the first wave sealing plate 9 and the second wave sealing plate 10 are made of rubber, and have good sealing effect, and the first wave plate sealing plate and the second wave plate sealing plate 10 have good expansion and contraction performance, and can slide along with the first sliding block 62 or the second sliding block 72, the gap between the side wall of the first slide block 62 and the side wall of the notch of the first slide groove 63 is blocked, or the gap between the side wall of the second slide block 72 and the side wall of the notch of the second slide groove 73 is blocked, so that the dust blocking effect is achieved.

In this embodiment, the wave crest of the first wave sealing plate 9 and the wave crest of the second wave sealing plate 10 are located on the same horizontal line with the upper surface of the object bearing table 3, and then the wave crests of the first wave sealing plate 9 and the second wave sealing plate 10 are all abutted against the lower surface of the paper board, so that the contact area with the paper board is increased, and the possibility of indentation between the lower surface of the paper board and the first sliding groove 63 and the second sliding groove 73 when the printing plate applies pressure to the paper board is reduced.

Referring to fig. 4 and 6, the notches of the first chute 63 and the second chute 73 are both provided with arc guide angles (not marked in the figures), so that the probability of indentation caused by the fact that the paperboard tightly abuts against the notches of the first chute 63 and the second chute 73 when the printing plate is pressed on the paperboard is further reduced, and the yield of the delivery of the paperboard is improved.

Referring to fig. 7, both side walls of the object bearing platform 3 are provided with locking assemblies 8 for fixing the first handle 64 and the second handle 74, after the first baffle 4 and the second baffle 5 are adjusted to proper positions, the first handle 64 and the second handle 74 are fixed by the locking assemblies 8, the first sliding block 62 is positioned in the first sliding groove 63, and the second sliding block 72 is positioned in the second sliding groove 73, so that the first baffle 4 and the second baffle 5 can be stably fixed at proper positions, the paperboard is stably limited, and the printing efficiency is prevented from being influenced by the deviation of the paperboard in the printing process.

Referring to fig. 7 and 8, the locking assembly 8 includes a magnetic ring 81, the magnetic ring 81 is fixed on one side wall and one side end wall of the object bearing platform 3, the first screw 61 and the second screw 71 both pass through the axis of the magnetic ring 81, the side walls of the first handle 64 and the second handle 74 both have a support rod 83, and there are two support rods 83, one support rod 83 is in the same direction as the axial direction of the first screw 61, and the other support rod 83 is in the same direction as the axial direction of the second screw 71.

The side walls of the first screw 61 and the second screw 71 are provided with through holes 84 for the support rod 83 to pass through, one end of the support rod 83 is connected with a limit plate 85, the other end of the support rod 83 is connected with an arc-shaped iron block 82, the limit plate 85 is pulled to drive the support rod 83 to slide in the through holes 84, so that the distance between the outer ring wall of the arc-shaped iron block 82 and the inner ring wall of the magnetic ring 81 is gradually increased, at the moment, a person can rotate the first handle 64 or the second handle 74, after the first handle 64 and the second handle 74 are rotated to proper positions, the limit plate 85 is pushed, so that the distance between the outer ring wall of the arc-shaped iron block 82 and the inner ring wall of the magnetic ring 81 is gradually decreased, the outer ring wall of the arc-shaped iron block 82 is adsorbed on the inner ring wall of the magnetic ring 81 by utilizing the magnetic force of the magnetic ring 81, and the positioning of the first handle 64 and the second handle 74 is further realized.

Referring to fig. 7 and 8, a spring 86 is sleeved on the supporting rod 83, one end of the spring 86 is connected with the inner annular wall of the arc-shaped iron block 82, the other end of the supporting rod 83 is connected with the side wall of the first handle 64 or the side wall of the second handle 74, the elastic force of the spring 86 is in the same direction as the axial direction of the supporting rod 83, after the first handle 64 or the second handle 74 stops rotating, the limiting plate 85 is released, the arc-shaped iron block 82 can be tightly abutted against the inner annular wall of the magnetic ring 81 by the elastic restoring force of the spring 86, and the positioning of the first handle 64 or the second handle 74 is realized.

The implementation principle of the paperboard limiting mechanism for the screen printing machine is as follows: at first according to the size of the cardboard, rotate the first in command 64, drive first screw 61 and rotate, because first spout 63 plays direction and limiting displacement to the sliding of first slider 62, drive first slider 62 and slide in first spout 63, and then drive first baffle 4 and slide in step, simultaneously according to first scale mark 11 and first instruction line 12, can be with first baffle 4 quick adjustment to suitable position. Along with the slip of first slider 62, drive first wave seal plate 9 flexible, can carry out the shutoff to the notch department of the lateral wall of first slider 62 and first spout 63, play the effect of keeping off dirt to first spout 63.

Then rotate second handle 74, drive the second bolt and rotate, because second spout 73 plays direction and limiting displacement to the slip of first slider 62, drive second slider 72 and slide in second spout 73, and then second baffle 5 slides in step, at the in-process that second baffle 5 slided, according to second scale mark 13 and second index line 14, with second baffle 5 quick adjustment to suitable position. Along with the sliding of the second sliding block 72, the two second wave sealing plates 10 stretch and retract, so that the side walls of the second sliding block 72 and the notches of the second sliding grooves 73 can be plugged, and further, the second sliding grooves 73 can be shielded from dust.

When the first handle 64 and the second handle 74 are rotated, the person pulls the limit plate 85 at the same time, so that the spring 86 is extended and contracted, further, a certain space exists between the outer arc wall of the arc-shaped iron block 82 and the inner arc wall of the magnetic ring 81, at this time, a person can stably rotate the first handle 64 and the second handle 74, after the first handle 64 and the second handle 74 stop rotating, the limit plate 85 is released, the arc-shaped iron block 82 can be adsorbed on the inner annular wall of the magnetic ring 81 by utilizing the elastic restoring force of the spring 86 and the magnetic attraction force of the magnetic ring 81, positioning of the first and second handles 64, 74 is achieved to hold the first and second flaps 4, 5 in place, and finally to place the sheet on the platform 3, make the short limit wall of cardboard contradict at the lateral wall of first baffle 4, the long limit wall of cardboard contradicts at the lateral wall of second baffle 5, has finally realized the location to the cardboard.

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 (9)

1. The utility model provides a cardboard stop gear for silk screen printing machine which characterized in that: including being used for setting up holding thing platform (3), sliding on workstation (2) of silk screen printing machine body (1) and setting up first baffle (4) on holding thing platform (3) and sliding second baffle (5) of setting on holding thing platform (3), hold thing platform (3) and be used for the bearing cardboard, the slip direction mutually perpendicular with second baffle (5) of first baffle (4), hold and be equipped with first adjusting part (6) that drive first baffle (4) slided to the cardboard direction, drive second baffle (5) second adjusting part (7) that slide to the cardboard direction on thing platform (3) respectively, enclose between the relative lateral wall of first baffle (4) and second baffle (5) and close and be formed with cardboard location space.

2. The paper board limiting mechanism for the screen printing machine according to claim 1, characterized in that: first adjusting part (6) include first screw rod (61) and with first screw rod (61) threaded connection's first slider (62), the upper surface of holding thing platform (3) and be equipped with first spout (63) along the length direction of cardboard, first screw rod (61) are rotating and are setting up in first spout (63), the lateral wall that holds thing platform (3) is stretched out to the one end of first screw rod (61) and are connected with first leader (64), first slider (62) slide in first spout (63), the lower surface mounting of first baffle (4) is at the upper surface of first slider (62).

3. The paper board limiting mechanism for the screen printing machine according to claim 2, characterized in that: the second adjusting assembly (7) comprises a second screw rod (71) and a second sliding block (72) in threaded connection with the second screw rod (71), the axial direction of the second screw rod (71) is perpendicular to the axial direction of the first screw rod (61), a second sliding groove (73) is formed in the upper surface of the object bearing table (3) and is arranged along the width direction of the paperboard, the second screw rod (71) is rotatably arranged in the second sliding groove (73), one end of the second screw rod (71) extends out of the side wall of the object bearing table (3) and is connected with a second handle (74), the second sliding block (72) slides in the second sliding groove (73), and the lower surface of the second baffle (5) is arranged on the upper surface of the second sliding block (72).

4. The paper board limiting mechanism for the screen printing machine according to claim 3, wherein: the two side walls of the object bearing table (3) are provided with locking assemblies (8) used for fixing a first handle (64) and a second handle (74), each locking assembly (8) comprises a magnetic ring (81), an arc-shaped iron block (82) adsorbed on the inner annular wall of the magnetic ring (81) and a support rod (83) connected with the inner arc wall of the arc-shaped iron block (82), the magnetic rings (81) are respectively arranged on the two side walls of the object bearing table (3), the side walls of the first screw rod (61) and the second screw rod (71) are provided with through holes (84), and one end, far away from the arc-shaped iron block (82), of the support rod (83) penetrates through the through holes (84) and is connected with a limiting plate (85).

5. The paper board limiting mechanism for the screen printing machine according to claim 4, wherein: the spring (86) is sleeved on the supporting rod (83), one end of the spring (86) is connected with the inner annular wall of the arc-shaped iron block (82), and the other end of the supporting rod (83) is connected with the side wall of the first handle (64) or the side wall of the second handle (74).

6. The paper board limiting mechanism for the screen printing machine according to claim 3, wherein: the wall of the groove is characterized in that first wave sealing plates (9) are adhered to two side walls of the first sliding block (62), one end, far away from the first sliding block (62), of each first wave sealing plate (9) is connected with the groove wall of the first sliding groove (63), second wave sealing plates (10) are adhered to two side walls of the second sliding block (72), and one end, far away from the second sliding block (72), of each second wave sealing plate (10) is connected with the groove wall of the second sliding groove (73).

7. The paper board limiting mechanism for the screen printing machine according to claim 6, wherein: the wave crest of the first wave sealing plate (9) and the wave crest of the second wave sealing plate (10) are located on the same horizontal line with the upper surface of the object bearing table (3).

8. The paper board limiting mechanism for the screen printing machine according to claim 6, wherein: first slider (62) and second slider (72) are the magnetic path, first baffle (4) and second baffle (5) are iron plate, first baffle (4) adsorb the upper surface at first slider (62), second baffle (5) adsorb the upper surface at second slider (72).

9. The paper board limiting mechanism for the screen printing machine according to claim 1, characterized in that: the thickness dimension of the first baffle (4) and the second baffle (5) is smaller than that of the paperboard.

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