CN111572175B

CN111572175B - Silk screen printing mould and silk screen printing machine

Info

Publication number: CN111572175B
Application number: CN202010495187.2A
Authority: CN
Inventors: 崔志良; 王文博
Original assignee: Heilongjiang Tianyouwei Electronics Co ltd
Current assignee: Heilongjiang Tianyouwei Electronics Co ltd
Priority date: 2020-06-03
Filing date: 2020-06-03
Publication date: 2020-12-29
Anticipated expiration: 2040-06-03
Also published as: CN111572175A

Abstract

The invention discloses a screen printing die and a screen printing machine, wherein a first die cavity and a second die cavity are respectively formed at the top of the screen printing die along an X axis; a space avoiding part and/or a bending die cavity corresponding to the curved surface part of the arched workpiece are formed at the joint of the first die cavity and the second die cavity; the silk-screen mould is provided with a pin joint structure, the rotation axis of the pin joint structure is parallel to the Y axis, and the rotation axis is adjacent to the clearance part and/or the bending mould cavity; the bottom surface of the first die cavity and the bottom surface of the second die cavity are both provided with vacuumizing holes; the silk screen printing mould further comprises a suction nozzle piece fixedly installed in the vacuum pumping hole, the suction nozzle piece comprises a pipe body and a flexible suction nozzle arranged at the upper end of the pipe body, and an opening at the upper end of the flexible suction nozzle protrudes out of the bottom surface of the corresponding first mould cavity and the bottom surface of the corresponding second mould cavity. The Y axis, the X axis, and the Z axis corresponding to the vertical direction are perpendicular two by two. According to the silk-screen printing die, the workpiece can be accurately fixed, the pressure of the scraper mechanism is stable, and the convex surface printing efficiency and quality of the arched workpiece are improved.

Description

Silk screen printing mould and silk screen printing machine

Technical Field

The invention relates to the technical field of printing equipment, in particular to a silk-screen mould and a silk-screen machine.

Background

The silk-screen printing belongs to stencil printing, and the working principle is as follows: the printing plate with holes for ink to pass through is first made and then the ink is transferred to the printing material through the holes of the plate under certain pressure during printing. The silk-screen printing process has strong adaptability and can adapt to printing stocks of different materials and different surface shapes. Printing of flat and simple circumferential surfaces is common in these applications, but for printing of convex surfaces of arcuate workpieces, the prior art proposes solutions generally consisting of two types: firstly, a bent screen printing plate is manufactured, and a scraper adapts to the screen printing plate to do curvilinear motion; and secondly, splitting the arched workpiece into subcomponents with simple surfaces, such as splitting into a workpiece with a plane printing surface and a workpiece with a circular arc printing surface. The first solution has difficulty in controlling the flow of ink and the pressure of the doctor blade, resulting in poor process adaptability and print quality. The second scheme conflicts with the demand of the integrated workpiece and has lower generation efficiency.

Disclosure of Invention

Based on the current situation, the invention mainly aims to provide a silk-screen printing die and a silk-screen printing machine which can improve the printing quality and efficiency of the convex surface of an arched workpiece.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

A silk screen printing die is applied to printing of a convex surface of an arched workpiece, wherein the convex surface of the arched workpiece comprises a first plane, a second plane and a curved surface which is respectively and smoothly connected with the first plane and the second plane;

a first die cavity and a second die cavity are respectively formed at the top of the silk-screen die along the X axis; a space-avoiding part and/or a curved die cavity corresponding to the curved surface part of the arched workpiece are formed at the joint of the first die cavity and the second die cavity;

the silk-screen mould is provided with a pivoting structure with a rotation axis parallel to the Y axis, the rotation axis is parallel to the Y axis, and the rotation axis is adjacent to the void avoiding part and/or the bending mould cavity;

the bottom surface of the first die cavity and the bottom surface of the second die cavity are both provided with vacuumizing holes; the silk-screen mould also comprises a suction nozzle piece fixedly arranged in the vacuumizing hole, the suction nozzle piece in the vacuumizing hole on the bottom surface of the first mould cavity is a first group of suction nozzle pieces, and the suction nozzle piece in the vacuumizing hole on the bottom surface of the second mould cavity is a second group of suction nozzle pieces;

the suction nozzle piece comprises a pipe body and a flexible suction nozzle arranged at the upper end of the pipe body, the upper end opening of the flexible suction nozzle of the first group of suction nozzle pieces (G1) correspondingly protrudes out of the bottom surface of the first die cavity, and the upper end opening of the flexible suction nozzle of the first group of suction nozzle pieces (G2) correspondingly protrudes out of the bottom surface of the second die cavity corresponding to the bottom surface of the first die cavity; the Y axis, the X axis and the Z axis corresponding to the vertical direction are vertical in pairs.

Preferably, a gap is formed between the flexible suction nozzle and the inner wall surface of the corresponding vacuumizing hole; the axes of the tube bodies of the first group of the suction nozzle pieces are vertical to the bottom surface of the first die cavity, and the axes of the tube bodies of the first group of the suction nozzle pieces are vertical to the bottom surface of the second die cavity.

Preferably, the screen printing mold comprises a substrate and a parallel cavity, the parallel cavity is opposite to the substrate, the first mold cavity is formed on the parallel cavity, the bottom surface of the first mold cavity is parallel to the substrate, the suction nozzles in the vacuum pumping holes on the parallel cavity are a first group of suction nozzles, and the tube bodies of the first group of suction nozzles are arranged between the parallel cavity and the substrate.

Preferably, the screen printing die further comprises a first rotating member and a plurality of first connecting rods, the distance between the lower surface of the parallel cavity member and the upper surface of the base plate is D1, the length of the tube body of the first group of nozzle members is L1, and D1 is greater than L1;

the first adapter is in a flat plate shape and is arranged between the base plate and the parallel die cavity piece, and the plurality of first connecting rods and the pipe bodies of the first group of suction nozzle pieces are all positioned between the parallel die cavity piece and the first adapter;

Preferably, the screen printing die further comprises a first fastening piece, the nozzle piece further comprises a side nozzle, the side nozzle is connected to the side wall of the tube body and communicated with the inner cavity of the tube body, an opening is formed at the lower end of the tube body, and an internal thread is formed on the inner wall surface of the opening at the lower end of the tube body; the lower end of the first adapter corresponding to the pipe body is provided with a first through hole, and the first fastener penetrates through the first through hole to be in threaded connection with the lower end opening of the pipe body and is sealed.

Preferably, the silk-screen mould further comprises a hoop, a second fastening piece and a third fastening piece, the parallel mould cavity piece is provided with a first screw hole corresponding to the first connecting rod, and the upper end of the first connecting rod is in threaded connection with the first screw hole;

the first connecting piece is provided with a second through hole corresponding to the first connecting rod, the first connecting rod penetrates through the second through hole, and the lower end of the first connecting rod extends out of the first connecting piece;

the hoop is provided with a sleeve hole and a clamping opening communicated with the sleeve hole, and the sleeve hole is sleeved with the first connecting rod; the outer peripheral surface of the hoop is provided with a second screw hole and a third through hole corresponding to the clamping opening respectively, and the second fastening piece penetrates through the third through hole and is in threaded connection with the second screw hole;

The hoop is further provided with a fourth through hole which is communicated up and down, the first rotating piece is provided with a third screw hole corresponding to the fourth through hole, and the third fastener penetrates through the third through hole to be in threaded connection with the third screw hole.

Preferably, the side wall of the first mold cavity is formed with a venting structure; the exhaust structure comprises a plurality of exhaust gaps, the exhaust gaps are located on two sides of the first mold cavity (21) on the Y axis, and the first mold cavity (21) is located on the X axis and is far away from one side of the second mold cavity.

Preferably, the screen printing die comprises a substrate and a plurality of inclined die cavity parts, the inclined die cavity parts are mounted on the substrate and are arranged at intervals along the X axis, the second die cavities are dispersedly formed on the inclined die cavity parts, and the bottom surfaces of the second die cavities are arranged obliquely relative to the substrate.

Preferably, a gap is formed between a lower surface of at least the inclined cavity member of the plurality of inclined cavity members, which is close to the first cavity, and an upper surface of the substrate; the silk-screen mould also comprises a second adaptor and a plurality of second connecting rods, wherein,

The second adaptor is arranged below the inclined die cavity part, the suction nozzle parts in the vacuumizing holes on the inclined die cavity part are a second group of suction nozzle parts, and the second connecting rods and the pipe bodies of the second group of suction nozzle parts are located between the inclined die cavity part and the second adaptor;

the upper end of the second connecting rod is detachably fixed with the inclined die cavity piece, and the lower end of the second connecting rod is detachably fixed with the second adaptor; the pipe body of the second group of suction nozzle pieces and the second adaptor piece are detachably fixed.

Preferably, the upper surface of the second adapter is parallel to the base plate, an upper groove is formed in the upper surface of the second adapter corresponding to the tube body of the second group of suction nozzles, the bottom surface of the upper groove is parallel to the bottom surface of the second die cavity, and the lower end surface of the tube body is in limit abutting joint with the bottom surface of the upper groove.

Preferably, the screen printing die further comprises a fourth fastening piece, the nozzle piece further comprises a side nozzle, the side nozzle is connected to the side wall of the tube body and communicated with the inner cavity of the tube body, an opening is formed at the lower end of the tube body, and an internal thread is formed on the inner wall surface of the opening at the lower end of the tube body;

A fifth through hole is formed in the bottom surface of the upper groove corresponding to the lower end of the pipe body, the lower end face of the pipe body is in limit abutting joint with the bottom surface of the upper groove, and the fourth fastener penetrates through the fifth through hole to be in threaded connection with the lower end opening of the pipe body and is sealed;

the lower surface of the inclined die cavity piece is provided with a avoiding groove, the avoiding groove is communicated with the vacuumizing hole and the side face, facing the first cavity, of the inclined die cavity piece, and the side nozzle is located in the avoiding groove.

Preferably, the silk-screen mold further comprises a fifth fastening piece, the second adaptor is in a long strip shape extending along the Y axis, two ends of the second adaptor are respectively provided with one second connecting rod correspondingly, the second connecting rod is provided with a sixth through hole, and two end faces of the second adaptor on the Y axis are provided with third screw holes communicated with the adjacent sixth through holes; the inclined die cavity part is provided with a fourth screw hole corresponding to the second connecting rod; the upper end of the second connecting rod is in threaded connection with the fourth screw hole, and the lower end of the second connecting rod is matched with the sixth through hole; the fifth fastener is in threaded fit with the third screw hole, and the inner end of the fifth fastener is in limit abutting joint with the second connecting rod.

Preferably, the component of the length of the tubes of the second set of mouthpiece in the Z axis is L2; in the plurality of inclined cavity pieces, the distance between the lower surface of one inclined cavity piece and the upper surface of the substrate is D2, the distance D2 is smaller than the distance L2, and the substrate is provided with a position avoiding opening matched with the second adaptor below the inclined cavity piece.

Preferably, the plurality of inclined cavity parts are machined from blanks with the same cross section, a lower surface of the inclined cavity part, which is farthest away from the first cavity, of the plurality of inclined cavity parts is attached and fixed on an upper surface of the substrate, and a gap is formed between the lower surface of the rest of the inclined cavity parts and the upper surface of the substrate.

Preferably, the screen printing die comprises a substrate, a parallel die cavity part arranged opposite to the substrate, and a plurality of inclined die cavity parts arranged on the substrate;

the first mold cavity is formed on the parallel mold cavity piece, and the bottom surface of the first mold cavity is parallel to the substrate; a plurality of inclined cavity parts are arranged at intervals along the X axis, the second cavities are dispersedly formed on the inclined cavity parts, and the bottom surfaces of the second cavities are obliquely arranged relative to the substrate;

The silk screen printing die further comprises a rotating shaft and two shaft hole seats fixed on the substrate, the two shaft hole seats are located between the parallel die cavity piece and the inclined die cavity piece adjacent to the parallel die cavity piece, and the rotating shaft is pivoted with the two shaft hole seats.

Preferably, the screen printing die further comprises two side plates and an end plate, the two side plates are respectively adjacent to two side edges of the base plate on the Y axis and are oppositely arranged, and the parallel die cavity piece and the inclined die cavity piece are both located between the two side plates; the side plate is fixedly connected with the base plate, the parallel die cavity piece and the inclined die cavity pieces, and the side plate is provided with through holes corresponding to the rotating shaft; the end plate covers an opening formed by enclosing the base plate, the parallel die cavity piece and the two side plates, and the end plate is fixedly connected with one or more of the base plate, the parallel die cavity piece and the two side plates.

The invention also provides a screen printing machine, which comprises a rack and a screen printing die, wherein the screen printing die is the screen printing die, and the screen printing die is pivoted with the rack through the pivoting structure.

When the silk-screen mould provided by the invention works, the second plane of the arched workpiece can be leveled with the screen surface of the silk-screen plate, and the second plane of the arched workpiece is firstly contacted with the screen surface of the silk-screen plate, and then the scraper mechanism is driven to move along the X axis to start printing; after the part is printed, the curved surface of the workpiece is kept in synchronous contact with the screen surface of the silk-screen printing plate by rotating the silk-screen mould, so that the curved surface of the workpiece is printed; and finally, when the silk-screen mould is rotated until the first plane is equal to the screen surface of the silk-screen plate, the rotation is stopped, and the scraper mechanism continues to move along the X axis until the first plane of the workpiece is printed. In the printing process, the independent suction nozzle piece additionally arranged in the vacuumizing hole is used for vacuumizing, so that the workpiece can be firmly adsorbed and fixed in the die cavity no matter where the silk-screen die is located or under the movement working condition. And compare and directly utilize the evacuation hole as the air flue in order to realize the evacuation and adsorb, then can realize the accurate control of adsorption affinity on the one hand, on the other hand can reduce the processing degree of difficulty of silk screen printing mould body to reduce cost. Secondly, the suction nozzle part is provided with a flexible suction nozzle, and the upper end opening of the suction nozzle part protrudes out of the bottom surface of the corresponding die cavity, so that the flexible and good sealing contact between the suction nozzle part and the workpiece is ensured. It can be understood that the silk-screen printing die of the invention can also print in this order during operation: the method comprises the following steps that (1) a first plane- > a curved surface- > a second plane of an arched workpiece; besides, the printing device can be matched with the scraper mechanism to reciprocate along the X axis to realize the color register printing of the same workpiece or the printing among different workpieces. The description of the working process of the silk-screen mould of the invention can discover that: firstly, the printed arched workpiece does not need to be split into separate parts, so that the printing process can be simplified; in addition, the workpiece can be guaranteed to resist extra gravity and scraping force through vacuum suction, the position precision is guaranteed, the scraper mechanism only needs to move along the X axis simply in the printing process, the screen surface of the silk screen printing plate can be a plane screen correspondingly, so that the printing ink is accurately distributed, and the printing precision is guaranteed by the stable pressure of the scraper mechanism.

Other advantages of the present invention will be described in the detailed description, and those skilled in the art will understand the technical features and technical solutions presented in the description.

Drawings

Preferred embodiments of a screen printing mold and a screen printing machine according to the present invention will be described below with reference to the accompanying drawings. In the figure:

fig. 1 is a schematic structural view of a screen printing machine according to a preferred embodiment of the present invention;

FIG. 2 is a schematic view of a screen printing mold and an arched workpiece in FIG. 1;

FIG. 3 is a schematic view of a first state of printing on the convex side of the arcuate workpiece of FIG. 2;

FIG. 4 is a schematic view of a third state of printing on the convex surface of the arcuate workpiece of FIG. 3;

FIG. 5 is a schematic structural diagram of the silk-screen mold shown in FIG. 1;

FIG. 6 is a schematic top view of the screen printing mold of FIG. 5;

FIG. 7 is a schematic cross-sectional view taken along line VI-VI in FIG. 6;

FIG. 8 is an enlarged view of a portion of FIG. 7 at A;

FIG. 9 is an enlarged view of a portion of FIG. 7 at B;

FIG. 10 is an exploded view of the silk-screen mold of FIG. 1;

FIG. 11 is a schematic view of an assembly structure of the first adapter, the first group of mouthpiece and the first connecting rod;

FIG. 12 is an exploded view of the structure of FIG. 11;

FIG. 13 is an enlarged view of one set of the hoops, second fastener, and third fastener of FIG. 12;

FIG. 14 is an enlarged view of one set of the bands at another angle to the second fastener in FIG. 12;

FIG. 15 is a schematic view of an assembly structure of the second adaptor, the second set of nozzles and the second connecting rod;

FIG. 16 is a schematic view of the structure of FIG. 15 from another angle;

FIG. 17 is an exploded view of the structure of FIG. 15;

fig. 18 is a schematic view of a back side structure of the cavity-tilting member of fig. 10.

List of reference numerals

Detailed Description

The invention mainly aims to provide a silk-screen printing die and a silk-screen printing machine which can improve the printing quality and efficiency of the convex surface of an arched workpiece.

Referring to fig. 1 to 4, in order to realize industrial printing of the convex surface of the arched workpiece 100, a corresponding screen printing machine may be provided, and the convex surface of the arched workpiece includes a first plane, a second plane, and curved surfaces respectively connected with the first plane and the second plane smoothly; the screen printing machine comprises a screen printing die 200, a frame 300, a scraper mechanism 400, a screen printing plate 500 and a plurality of driving mechanisms for driving movable parts to move.

In the screen printing machine, referring to fig. 5, a first cavity 21 and a second cavity 22 are respectively formed at the top of a screen printing mold 200 along an X-axis, and a void-avoiding portion 24 and/or a curved cavity corresponding to a curved portion of the arched workpiece 100 is formed at a joint of the first cavity 21 and the second cavity 22.

The silk-screen mould 200 is provided with a pivoting structure 10, the rotation axis of the pivoting structure 10 is parallel to the Y axis, and the rotation axis is adjacent to the void-avoiding part 24 and/or the curved mould cavity;

the bottom surface of the first die cavity 21 and the bottom surface of the second die cavity 22 are both provided with vacuumizing holes 23; the silk-screen mold 200 further comprises suction nozzle pieces 30 fixedly installed in the vacuuming holes 23, the suction nozzle pieces 30 in the vacuuming holes 23 on the bottom surface of the first mold cavity 21 are a first group of suction nozzle pieces G1, and the suction nozzle pieces 30 in the vacuuming holes 23 on the bottom surface of the second mold cavity 22 are a second group of suction nozzle pieces G2;

referring to fig. 6 to 9, the nozzle piece 30 includes a tube 31 and a flexible nozzle 32 disposed at an upper end of the tube 31, an upper opening of the flexible nozzle 32 of the first group of nozzle pieces G1 protrudes from a bottom surface of the first mold cavity 21, and an upper opening of the flexible nozzle 32 of the second group of nozzle pieces G2 protrudes from a bottom surface of the second mold cavity 22; the Y axis, the X axis, and the Z axis corresponding to the vertical direction are perpendicular two by two.

In this embodiment, the screen printing mold 200 may be an integral structure or may be assembled by a plurality of components. The pivot structure 10 is used to pivot with the frame 300, the pivot structure 10 may be a simple shaft hole, or a fixed rotating shaft 11, or the shaft hole and the rotating shaft 11 may be rotatably engaged, and the rotating shaft 11 is used to be fixed with an external member.

Through setting up evacuation hole 23 to add independent suction nozzle piece 30 in evacuation hole 23, this suction nozzle piece 30 is the standard component of unified specification preferentially, compares and directly utilizes evacuation hole 23 as the air flue in order to realize the evacuation and adsorb, then can realize the accurate control of adsorption affinity on the one hand, and on the other hand can reduce the processing degree of difficulty of silk screen printing mould 200 body, thereby reduce cost. Secondly, the nozzle member 30 is provided with flexible nozzles 32 and has upper end openings protruding from the bottom surface of the corresponding mold cavity, thus ensuring flexible and good sealing contact between the nozzle member 30 and the workpiece 100. In order to provide a good deformation, the cross-sectional shape of the flexible suction nozzle 32 may be arranged wave-like. It can be understood that the flexible nozzle 32 can be made of rubber, silica gel, or other materials with good elasticity and wear resistance.

Whether the bottom surfaces of the first cavity 21 and the second cavity 22 are continuous or not, and whether the joint of the first cavity 21 and the second cavity 22 is directly set in a clearance or correspondingly set to be a curved cavity, may be optionally determined according to the strength of the printed workpiece 100 itself. Preferably, the extended surface of the bottom surface of the first cavity 21 is EA, the extended surface of the bottom surface of the second cavity 22 is EB, and the intersection line of EA and EB is parallel to the Y axis and higher than the rotation axis.

Referring to fig. 3 and 4 again, when the screen printing mold 200 provided by the present invention works, the second plane of the arched workpiece may be first leveled with the screen surface of the screen printing plate 500, and the second plane of the arched workpiece may be first contacted with the screen surface of the screen printing plate 500, and then the scraper mechanism 400 is driven to move along the X axis to start printing; after the part is printed, the silk-screen mould 200 of the invention is rotated to ensure that the curved surface part of the workpiece 100 positioned in the clearance part 24 or the bending mould cavity keeps synchronous contact with the screen surface of the silk-screen printing plate 500, thus finishing the printing of the curved surface of the workpiece 100; finally, when the screen printing mold 200 of the present invention is rotated until the first plane is equal to the screen surface of the screen printing plate 500, the rotation is stopped, and the scraper mechanism 400 continues to move along the X-axis until the first plane of the workpiece is printed. During the printing process, the independent suction nozzle piece additionally arranged in the vacuum hole 23 is used for vacuum-pumping operation, so that the workpiece 100 can be firmly adsorbed and fixed in the die cavity no matter where the silk-screen die 200 is located or under the motion condition. And compared with the method of directly utilizing the vacuumizing hole as the air passage to realize vacuumizing adsorption, the method has the advantages that

On the one hand, precise control of the suction force can be achieved, for example, only the second group of suction nozzle pieces G2 can be opened when printing the first plane of the arched workpiece; while printing the second plane, it is possible to turn on only the first group of nozzles G1 or make the suction force of the first group of nozzles G1 greater than the suction force of the second group of nozzles G2;

On the other hand, the processing difficulty of the silk-screen mould body can be reduced, so that the cost is reduced. Secondly, the suction nozzle part is provided with a flexible suction nozzle, and the upper end opening of the suction nozzle part protrudes out of the bottom surface of the corresponding die cavity, so that the flexible and good sealing contact between the suction nozzle part and the workpiece is ensured.

It is understood that the silk-screen mold 200 of the present invention can also perform printing in this order during operation: the second plane- > curved surface- > first plane of the arched workpiece 100; in addition, the reciprocating motion of the scraper mechanism 400 along the X axis can be matched to realize the color register printing of the same workpiece 100 or the printing between different workpieces 100. Through the above description of the working process of the silk-screen printing mold 200 of the present invention, it can be found that: the arched workpiece 100 to be printed first does not need to be separated into separate parts, so that the printing process can be simplified; in addition, the workpiece 100 can be guaranteed to resist extra gravity and scraping force through vacuum suction, the position precision is guaranteed, the scraper mechanism 400 only needs to move along the X axis simply in the printing process, the screen surface of the silk-screen printing plate 500 can be a plane screen correspondingly, so that the printing ink is distributed accurately, and the printing precision is guaranteed through the stable pressure of the scraper mechanism 400.

Further, in order to prevent the edges of the vacuuming holes 23 from interfering with the deformation of the flexible suction nozzle 32 and to facilitate the assembly of the nozzle piece 30, a gap is formed between the flexible suction nozzle 32 and the inner wall surface of the corresponding vacuuming hole 23. In order to better achieve the suction effect and avoid the suction force itself forming a component parallel to the bottom surface of the corresponding mold cavity, the axis of the tube 31 of the first group of nozzles G1 is perpendicular to the bottom surface of the first mold cavity 21, and the axis of the tube 31 of the first group of nozzles G1 is perpendicular to the bottom surface of the second mold cavity 22.

Further, referring to fig. 10 to 12, in an embodiment, the screen printing mold 200 includes a substrate 40 and a parallel cavity 50, the parallel cavity 50 is disposed opposite to the substrate 40, the first mold cavity 21 is formed on the parallel cavity 50, a bottom surface of the first mold cavity 21 is parallel to the substrate 40, the suction nozzles 30 in the vacuuming holes 23 on the parallel cavity 50 are a first group of suction nozzles G1, and the tubes 31 of the first group of suction nozzles G1 are disposed between the parallel cavity 50 and the substrate 40.

In this embodiment, the parallel cavity member 50 may be connected to the base plate 40 by a support plate or a support pillar, etc. to maintain the opposite arrangement to the base plate 40. The screen printing mold 200 is configured to include the substrate 40 and the parallel cavity member 50 disposed opposite to each other, so that the required structural features can be processed separately without occupying an excessive volume from the beginning; in addition, the cost of the installation space for accommodating the first group of mouthpiece G1 formed in this structure is relatively low.

Further, the screen printing mold 200 further includes a first adaptor 61 and a plurality of first connecting rods 711, a distance between the lower surface of the parallel cavity 50 and the upper surface of the base plate 40 is D1, a length of the tube 31 of the first group of nozzles G1 is L1, and D1 is greater than L1;

The first adaptor 61 is flat and disposed between the base plate 40 and the parallel cavity member 50, and the plurality of first connecting rods 711 and the tube 31 of the first group of nozzle members G1 are disposed between the parallel cavity member 50 and the first adaptor 61;

the upper end of the first connecting rod 711 is detachably fixed with the parallel cavity part 50, and the lower end is detachably fixed with the first adaptor 61; the tubular body 31 of the first group of mouthpiece G1 is detachably fixed to the first adapter 61.

In this embodiment, in order to utilize the structural supporting force of the substrate 40 together, the distance between the lower surface of the parallel cavity member 50 and the upper surface of the substrate 40 may be excessively large, i.e., larger than the corresponding size of the nozzle member 30 as a standard. And since the dimensional positional relationship of the first group of nozzle pieces G1 with respect to the parallel cavity pieces 50 is important, it is preferable that the first transfer link 61 connected to the parallel cavity pieces 50 through the first connection rod 711 be provided to fixedly mount the first group of nozzle pieces G1, so that the central position and height of the first group of nozzle pieces G1 at each corresponding vacuuming hole 23 can be accurately secured. The detachable fixing in this embodiment includes direct clamping, screw connection, etc., and also includes detachable fixing by additional accessories.

Further, the screen printing mold 200 further includes a first fastening member 721, the suction nozzle member 30 further includes a side nozzle 33, the side nozzle 33 is connected to the sidewall of the tube 31 and is communicated with the inner cavity of the tube 31, an opening is formed at the lower end of the tube 31, and an internal thread is formed on the inner wall surface of the lower end opening of the tube 31; the first adapter 61 is provided with a first through hole 611 corresponding to the lower end of the tube 31, and the first fastener 721 passes through the first through hole 611 to be in threaded connection with and sealed with the lower opening of the tube 31.

In this embodiment, the connection position of the connection evacuation pipe can be changed and the position of the installation space of the corresponding evacuation pipe can be changed to a certain extent by setting the side nozzle 33, so that the occupation of the space in the axial direction of the pipe body 31 is reduced, and the installation of the evacuation pipe is facilitated. In addition, the first fastening member 721 accomplishes both sealing of the lower end of the tube body 31 to ensure ventilation of the side nipple 33 and fixing of the suction nozzle piece 30, thereby simplifying installation of parts.

Further, a counter bore 612 is formed at the inlet of the upper end of the first through hole 611, the lower end of the tube body 31 is embedded in the counter bore 612 and is in clearance fit with the counter bore 612, and the lower end surface of the tube body 31 is in limit fit with the bottom surface of the counter bore 612.

In the embodiment, the counter bore 612 is arranged in clearance fit, so that the pre-positioning of the first group of the suction nozzle pieces G1 can be facilitated, and the quick installation of a plurality of suction nozzle pieces 30 can be realized; the bottom surface of the counter bore 612 is in limit fit with the lower end surface of the tube body 31, which is beneficial to ensuring the precision of the height of the suction nozzle piece 30.

Further, referring to fig. 13 and 14, in an embodiment, the screen printing mold 200 further includes a hoop 73, a second fastening member 722 and a third fastening member 723, the parallel cavity 50 is provided with a first screw hole 51 corresponding to the first connecting rod 711, and an upper end of the first connecting rod 711 is in threaded connection with the first screw hole 51;

the first connecting piece 61 is provided with a second through hole 613 corresponding to the first connecting rod 711, the first connecting rod 711 passes through the second through hole 613, and the lower end of the first connecting rod 711 extends out of the first connecting piece 61;

the hoop 73 is provided with a trepan 731 and a clamping opening 732 communicated with the trepan 731, and the trepan 731 is sleeved with the first connecting rod 711; the outer peripheral surface of the hoop 73 is provided with a second screw hole 733 and a third through hole 734 corresponding to the clamping opening 732, and the second fastener 722 passes through the third through hole 734 to be in threaded connection with the second screw hole 733;

the hoop 73 is further provided with a fourth through hole 735 which is vertically through, the first adapting piece 61 is provided with a third screw hole 625 corresponding to the fourth through hole 735, and the third fastening piece 723 passes through the third through hole 734 to be in threaded connection with the third screw hole 625.

In this embodiment, since the parallel cavity member 50 is parallel to the base plate 40, it is more practical to machine the bottom surface of the first cavity 21 provided thereon into a continuous plane; not limited to this, it results that the parallel cavity member 50 should be provided with a sufficient number of evacuation holes 23 in order to support the self weight of the first transfer member 61 for mounting the corresponding first group of nozzle pieces G1 and the required total supporting force is larger. In this embodiment, the first connecting rod 711 is screwed to the parallel cavity member 50 at one end, and is connected to the fixed hoop 73 at the other end, and then the hoop 73 is abutted against the lower surface of the first rotating member 61, and finally the hoop 73 is fixed to the first rotating member 61 by the third fastening member 723, so that sufficient supporting force can be provided for the first rotating member 61 and the first group of nozzle members G1. In addition, the height of the first transfer member 61 can be easily adjusted by applying the band 73, thereby facilitating the suction nozzle members 30 of other specifications.

Further, referring to fig. 7, and fig. 10 to 12, in an embodiment, in order to ensure smooth air flow of the evacuated air tube, the screen printing mold 200 further includes a plurality of air tube clamps 74, the plurality of air tube clamps 74 are detachably fixed on the upper surface of the first adaptor 61 and the upper surface of the base plate 40, specifically, the air tube clamps 74 may be detachably fixed on the first adaptor 61 and the base plate 40 by bolts. In addition, the air pipes led out from the silk screen printing die 200 are prevented from influencing the rotation of the silk screen printing die 200, a plurality of air pipe cluster through holes 41 are formed in the substrate 40, and the air pipe cluster through holes 41 are used for bundling a plurality of air pipes.

Further, the screen printing mold 200 further includes a plurality of first supporting rods 751, the plurality of first supporting rods 751 are located between the parallel cavity member 50 and the substrate 40, and two ends of the first supporting rods 751 are detachably fixed with the parallel cavity member 50 and the substrate 40, respectively.

In this embodiment, the first supporting rods 751 can provide sufficient supporting force, occupy a small space, and can be set to a uniform specification, so that the manufacturing cost of the screen printing mold 200 of the present invention can be reduced by applying the first supporting rods 751.

Further, in the case that the area of the arched workpiece 100 is large and the material is brittle, if the air between the workpiece 100 and the bottom surface of the mold cavity cannot be exhausted in time during the vacuum suction process, the workpiece may be broken or the original flatness may not be maintained, and the workpiece 100 may be discarded or the printing quality may be poor. To solve this problem, referring to fig. 5 to 10 again, in an embodiment, the side wall of the first mold cavity 21 is formed with a venting structure 211. The venting feature 211 may be a vent hole or notch formed in a sidewall of the first mold cavity 21. Although in the case that the inside of the screen printing mold 200 is hollowed out and the inner cavity is communicated with the outside, if the connection part of the first mold cavity 21 and the second mold cavity 22 is provided with the clearance part 24 communicated with the inner cavity or the outside, the air exhaust of the first mold cavity 21 can be realized, preferably, in order to realize air exhaust from more directions and reduce the area of the side wall positioning surface of the first mold cavity 21, the air exhaust structure 211 comprises a plurality of air exhaust notches, and the plurality of air exhaust notches are located on two sides of the first mold cavity 21 on the Y axis and on one side of the first mold cavity 21 on the X axis and far away from the second mold cavity 22.

Further, referring to fig. 5 to 7, 9 and 10 again, in an embodiment, the screen printing mold 200 includes a substrate 40 and a plurality of inclined mold cavities (80a, 80b), the plurality of inclined mold cavities (80a, 80b) are mounted on the substrate 40, the plurality of inclined mold cavities (80a, 80b) are spaced along the X-axis, the second mold cavities 22 are dispersedly formed on the plurality of inclined mold cavities (80a, 80b), and the bottom surfaces of the second mold cavities 22 are inclined with respect to the substrate 40.

In this embodiment, the second cavities 22 are distributed on a plurality of inclined cavity members (80a, 80b), so that an additional exhaust channel can be formed between two adjacent inclined cavity members 80a, thereby preventing the workpiece 100 from being damaged or bumpy during the vacuum suction process for fixing the workpiece 100. In addition, by providing a plurality of inclined cavity members (80a, 80b), the processing area can be reduced, thereby reducing the manufacturing cost of the screen printing die 200.

Further, a gap is formed between at least a lower surface of the inclined cavity member 80a, which is close to the first cavity 21, of the plurality of inclined cavity members (80a, 80b) and an upper surface of the base plate 40; the silk-screen mold 200 further includes a second adaptor 62 and a plurality of second connecting rods 712, wherein,

the second adaptor 62 is arranged below the inclined cavity part 80a, the suction nozzle parts 30 in the vacuuming holes 23 on the inclined cavity part 80a are a second group of suction nozzle parts G2, and the plurality of second connecting rods 712 and the tube bodies 31 of the second group of suction nozzle parts G2 are located between the inclined cavity part 80a and the second adaptor 62;

The upper end of the second connecting rod 712 is detachably fixed with the inclined cavity part 80a, and the lower end is detachably fixed with the second adaptor 62; the tube 31 of the second group of mouthpiece G2 is removably secured to the second adaptor 62.

In this embodiment, when a gap is formed between the inclined cavity member 80a and the base plate 40, the second adaptor member 62 and the second group of nozzle members G2 can be installed by using the gap; similar to the previous embodiment in which the first adaptor 61 is provided, since the dimensional positional relationship of the second group nozzle piece G2 with respect to the tilt mold cavity 80a is important, it is preferable to provide the second adaptor 62 connected to the tilt mold cavity 80a by the second connecting rod 712 to fixedly mount the second group nozzle piece G2, so that the central position and height of each corresponding vacuum hole 23 of the second group nozzle piece G2 on the tilt mold cavity 80a can be precisely secured. The detachable fixing in this embodiment includes direct clamping, screw connection, etc., and also includes detachable fixing by additional accessories.

Further, referring to fig. 15 to 17, in an embodiment, the upper surface of the second adaptor 62 is parallel to the substrate 40, the upper surface of the second adaptor 62 is provided with an upper groove 621 corresponding to the tube 31 of the second group of suction nozzle G2, the bottom surface of the upper groove 621 is parallel to the bottom surface of the second cavity 22, and the lower end surface of the tube 31(31) is in limit abutment with the bottom surface of the upper groove 621 (621).

In this embodiment, the upper surface of the second adaptor 62 is parallel to the substrate 40, so that it is convenient to position the second adaptor 62 and the substrate 40, and to machine and secure the connecting structure, such as a fixing hole or a through hole, at this position. Similar to the previous embodiment in which the upper end inlet of the first through hole 611 is provided with the counter bore 612 and the bottom surface of the counter bore 612 is used for limiting, the lower end surface of the tube 31 is limited by the bottom surface of the upper groove 621 parallel to the bottom surface of the second mold cavity 22, which is beneficial to ensure the accuracy of the height of the nozzle piece 30.

Further, the screen printing mold 200 further includes a fourth fastening member 724, the suction nozzle member 30 further includes a side nozzle 33, the side nozzle 33 is connected to the sidewall of the tube 31 and is communicated with the inner cavity of the tube 31, an opening is formed at the lower end of the tube 31, and an internal thread is formed on the inner wall surface of the opening at the lower end of the tube 31;

the lower surface of the second adaptor 62 is parallel to the base plate 40, the lower surface of the second adaptor 62 corresponding to the tube 31 of the second group of nozzle pieces G2 is provided with a lower groove 622, and the bottom surface of the lower groove 622 is parallel to the bottom surface of the second mold cavity 22;

the bottom surface of the second counterbore 612 is provided with a fifth through hole 623 corresponding to the lower end of the tube 31, and the fourth fastener 724 passes through the fifth through hole 623 and is in threaded connection with the lower end opening of the tube 31 and is sealed.

In this embodiment, similar to the first group of mouthpiece G1, the position of the trachea installation space can be adjusted by providing the side nozzle 33 on the mouthpiece 30 below the inclined cavity member 80a to better ensure the trachea to be unobstructed. In addition, the fourth fastening member 724 effects both sealing of the lower end of the tube body 31 to ensure ventilation of the side nipple 33 and fixing of the mouthpiece 30, thereby simplifying the mounting of parts; and the bottom surface of the lower groove 622 is parallel to the bottom surface of the second cavity 22, so that the fastening force generated when the head of the fourth fastening member 724 abuts against the second cavity 22 can be perpendicular to the bottom surface of the second cavity 22, and the tube 31 of the second group of nozzle pieces G2 can be more easily kept perpendicular to the bottom surface of the second cavity 22.

Further, referring to fig. 18, in an embodiment, the screen printing mold 200 further includes a fourth fastening member 724, the suction nozzle 30 further includes a side nozzle 33, the side nozzle 33 is connected to a sidewall of the tube 31 and is communicated with an inner cavity of the tube 31, an opening is formed at a lower end of the tube 31, and an internal thread is formed on an inner wall surface of the opening at the lower end of the tube 31;

the bottom surface of the upper groove 621 is provided with a fifth through hole 623 corresponding to the lower end of the tube body 31, the lower end surface of the tube body 31 is in limit abutting joint with the bottom surface of the upper groove 621, and the fourth fastener 724 penetrates through the fifth through hole 623 and is in threaded connection with the lower end opening of the tube body 31 and is sealed;

The lower surface of the inclined die cavity piece 80a is provided with a spacing groove 81, the spacing groove 81 is communicated with the vacuumizing hole 23 and the side surface of the inclined die cavity piece 80a facing the first cavity, and the side nozzle 33 is positioned in the spacing groove 81.

In this embodiment, compared with the previous embodiment, the inclined cavity member 80a of the present embodiment is provided with the avoiding groove 81, the side nozzles 33 of the second group of nozzle members can be accommodated in the avoiding groove 81, and compared with the arrangement below the inclined cavity member 80a parallel to the lower surface of the substrate 40, the structure can reduce the occupation of the upper and lower spaces, so that the structure of the screen printing mold 200 itself is more compact.

Further, referring to fig. 5 to 7, 9 and 10, and 15 to 17 again, in an embodiment, the screen printing mold 200 further includes a fifth fastening member (not shown), the second adaptor 62 is in a long shape extending along the Y axis, two ends of the second adaptor 62 are respectively provided with a second connecting rod 712 having a sixth through hole 624 correspondingly, two end surfaces of the second adaptor 62 on the Y axis are provided with third screw holes 625 communicating with the adjacent sixth through holes 624; the inclined cavity member 80a is provided with a fourth screw hole 82 corresponding to the second connecting rod 712; the upper end of the second connecting rod 712 is in threaded connection with the fourth screw hole 82, and the lower end is matched with the sixth through hole 624; the fifth fastener is in threaded fit with the third screw hole 625, and the inner end of the fifth fastener is in limit abutment with the second connecting rod 712.

In this embodiment, unlike the previous embodiment in which the first transfer member 61 is provided, since the second cavities 22 are distributed over a plurality of inclined cavity members (80a, 80b), a smaller number of evacuation holes 23 are provided in each inclined cavity member 80a, even if no evacuation holes 23 are provided; in the case where a small number of vacuum holes 23 need to be provided in the inclined cavity member 80a, the self weight of the second adaptor 62 for mounting the corresponding second group of nozzle pieces G2 and the total supporting force required are relatively small. Therefore, the third screw holes 625 are formed in the two end faces of the Y axis of the second adaptor 62, and the requirement for the supporting force of the second adaptor 62 is met by the fifth fastener, namely the rib and second connecting rod 712, so that the corresponding fixing structure is simplified, the accurate adsorption force direction can be ensured, and the manufacturing cost of the screen printing mold 200 can be reduced.

Further, the component of the length of the tube body 31 of the second group of mouthpiece G2 in the Z-axis is L2; among the plurality of inclined cavity pieces (80a, 80b), the distance between the lower surface of one inclined cavity piece 80a and the upper surface of the base plate 40 is D2, D2 is smaller than L2, and the base plate 40 is provided with a position avoiding port matched with the second adaptor 62 below the inclined cavity piece 80 a.

In the present embodiment, in order to mount the inclined cavity member 80a with the simple plate-shaped base plate 40 as much as possible and to secure the mounting of the second adaptor 62, when the distance between the inclined cavity member 80a and the base plate 40 is insufficient, a position-avoiding opening corresponding to the second adaptor 62 is provided in the base plate 40. Another function of the positioning notch is to adapt to the second adapter 62 due to its shape.

Further, the screen printing mold 200 further includes a plurality of second support rods (752a, 752b), the plurality of second support rods (752a, 752b) are located between the inclined mold cavity 80a and the substrate 40, and two ends of the second support rods (752a, 752b) are detachably fixed with the inclined mold cavity 80a and the substrate 40, respectively.

In this embodiment, similar to the embodiment of disposing the parallel cavity member 50 and the first support bars 751 thereon, the second support bars (752a, 752b) are disposed to ensure the supporting force and to construct the accommodating space between the substrate 40 and the inclined cavity member 80a at a low cost.

Further, referring to fig. 5 to 7, 9 and 10, in an embodiment, the plurality of inclined cavity members (80a, 80b) are machined from blanks having the same cross section, and a lower surface of the inclined cavity member 80b farthest from the first cavity 21 among the plurality of inclined cavity members (80a, 80b) is fitted and fixed on the upper surface of the substrate 40, and a gap is formed between the lower surface of the remaining inclined cavity member 80a and the upper surface of the substrate 40.

In this embodiment, the inclined cavity members (80a) with different upper surface features are machined by using blanks with the same cross section, while other structures may use the same structures, such as the threaded holes connected to the second support rods (752a, 752b), and more importantly, these same blanks may use the same positioning surfaces and positioning references during machining, so that the second cavities 22 formed by splicing can ensure sufficient splicing accuracy, for example, the bottom wall surfaces and the side wall surfaces of the segments of the second cavities 22 of different inclined cavity members 80a can be aligned with high accuracy as much as possible. In addition, the common blank processing is adopted, and the processing and manufacturing cost of the silk-screen mould 200 can be reduced.

Further, the side wall surface of the second cavity 22 on the inclined cavity member 80b farthest from the first cavity 21 is a semi-surrounding shape extending continuously.

In this embodiment, the side wall surface is a semi-surrounding shape extending continuously, so that when the side wall surface is used as an initial printing reference point, the deformation amount or the fall change of the lower end of the scraper in the vertical direction on the screen surface of the screen printing plate is small, thereby ensuring that the ink scraping pressure is transited from the screen printing mold 200 to the workpiece 100 with a smooth characteristic, and further ensuring the printing quality of the initial end of the workpiece 100.

Further, referring to fig. 5 to 7 and fig. 10 again, in an embodiment, the screen printing mold 200 includes a substrate 40, a parallel cavity member 50 disposed opposite to the substrate 40, and a plurality of inclined cavity members (80a, 80b) mounted on the substrate 40;

the first cavity 21 is formed on the parallel cavity member 50, and the bottom surface of the first cavity 21 is parallel to the substrate 40; a plurality of inclined cavity members (80a, 80b) are arranged at intervals along the X axis, the second cavities 22 are dispersedly formed on the plurality of inclined cavity members (80a, 80b), and the bottom surfaces of the second cavities 22 are arranged obliquely with respect to the substrate 40;

the screen printing mold 200 further includes a rotating shaft 11 and two shaft hole seats 12 fixed on the substrate 40, the two shaft hole seats 12 are located between the parallel cavity 50 and the inclined cavity 80a adjacent to the parallel cavity 50, and the rotating shaft 11 is pivotally connected to the two shaft hole seats 12.

In this embodiment, the rotating shaft 11 is connected with the two shaft hole seats 12 to ensure a stable internal pivot structure 10, and since the silk-screen mold 200 itself is already provided with the rotating shaft 11, only the two ends of the rotating shaft 11 need to be fixed to the frame 300 of the silk-screen printing machine during installation, so that convenience in installation is brought.

Further, the screen printing mold 200 further includes two side plates 76 and an end plate 77, the two side plates 76 are respectively adjacent to two sides of the substrate 40 on the Y axis and are oppositely disposed, and the parallel cavity member 50 and the inclined cavity member 80a are both located between the two side plates 76; the side plate 76 is fixedly connected with the substrate 40, the parallel cavity 50 and the inclined cavity (80a, 80b), and the side plate 76 is provided with a side through hole 761 corresponding to the rotating shaft 11; the end plate 77 covers an opening defined by the base plate 40, the parallel cavity 50 and the two side plates 76, and the end plate 77 is fixedly connected to one or more of the base plate 40, the parallel cavity 50 and the two side plates 76.

In this embodiment, the parallel cavity members 50, the inclined cavity members 80a and the substrate 40 are fixed on two sides of the substrate, so that the strength of the screen printing mold 200 is increased, deformation caused by the pressure of the scraper mechanism 400 during the printing process can be reduced, and the corresponding printing effect can be ensured. In addition, the two side plates 76 and the end plate 77 surround the sides of the screen printing mold 200, thereby providing a certain protection for the internal structure of the screen printing mold 200, for example, preventing the malfunction due to the intrusion of foreign matter.

The invention also provides a screen printing machine, which comprises a frame 300 and a screen printing die 200, wherein the screen printing die 200 is the screen printing die 200, and the screen printing die 200 is pivoted with the frame 300 through a pivoting structure 10. The specific structure of the screen printing mold 200 refers to the above embodiments, and since the screen printing machine adopts all the technical solutions of all the above embodiments, all the beneficial effects brought by the technical solutions of the above embodiments are also achieved, and are not repeated here.

It will be appreciated by those skilled in the art that the above-described preferred embodiments may be freely combined, superimposed, without conflict.

It will be understood that the embodiments described above are illustrative only and not restrictive, and that various obvious and equivalent modifications and substitutions for details described herein may be made by those skilled in the art without departing from the basic principles of the invention.

Claims

1. A silk screen printing die is applied to printing convex surfaces of an arched workpiece, the convex surfaces of the arched workpiece comprise a first plane, a second plane and curved surfaces which are respectively and smoothly connected with the first plane and the second plane,

a first die cavity (21) and a second die cavity (22) are respectively formed at the top of the silk-screen die along the X axis; a clearance part (24) and/or a bending die cavity corresponding to the curved surface part of the arched workpiece are formed at the joint of the first die cavity (21) and the second die cavity (22);

the silk-screen mould is provided with a pivoting structure (10), the rotation axis of the pivoting structure (10) is parallel to the Y axis, and the rotation axis is adjacent to the space avoiding part (24) and/or the bending mould cavity;

the bottom surface of the first die cavity (21) and the bottom surface of the second die cavity (22) are both provided with vacuumizing holes (23); the silk-screen mould also comprises a suction nozzle piece (30) fixedly arranged in the vacuumizing hole (23); the mouthpiece (30) in the evacuation hole (23) on the bottom surface of the first mold cavity (21) is a first set of mouthpieces (G1), and the mouthpiece (30) in the evacuation hole (23) on the bottom surface of the second mold cavity (22) is a second set of mouthpieces (G2);

the suction nozzle piece (30) comprises a pipe body (31) and a flexible suction nozzle (32) arranged at the upper end of the pipe body (31), and the upper end opening of the flexible suction nozzle (32) of the first group of suction nozzle pieces (G1) correspondingly protrudes out of the bottom surface of the first mold cavity (21); the upper end openings of the flexible suction nozzles (32) of the second group of suction nozzle pieces (G2) correspondingly protrude out of the bottom surface of the second mold cavity (22); the Y axis, the X axis and the Z axis corresponding to the vertical direction are vertical in pairs.

2. The screen printing die as claimed in claim 1, wherein a gap is formed between the flexible suction nozzle (32) and the inner wall surface of the corresponding vacuuming hole (23); the axis of the tube (31) of the first group of mouthpiece (G1) is perpendicular to the bottom surface of the first mould cavity (21), and the axis of the tube (31) of the second group of mouthpiece (G2) is perpendicular to the bottom surface of the second mould cavity (22).

3. A screen printing mould as claimed in claim 1 or 2, characterized in that it comprises a base plate (40) and parallel cavity members (50) arranged opposite to the base plate (40), the first mould cavities (21) being formed in the parallel cavity members (50), the bottom surfaces of the first mould cavities (21) being parallel to the base plate (40), the tubular bodies (31) of the first group of nozzle members (G1) being arranged between the parallel cavity members (50) and the base plate (40).

4. The screen printing mold of claim 3,

the silk screen mould further comprises a first rotating member (61) and a plurality of first connecting rods (711), the distance between the lower surface of the parallel cavity piece (50) and the upper surface of the base plate (40) is D1, the length of a tube body (31) of the first group of suction nozzle pieces (G1) is L1, and the D1 is larger than the L1;

The first transfer piece (61) is in a flat plate shape, the first transfer piece (61) is arranged between the base plate (40) and the parallel cavity piece (50), and the plurality of first connecting rods (711) and the pipe bodies (31) of the first group of suction nozzle pieces (G1) are arranged between the parallel cavity piece (50) and the first transfer piece (61);

the upper end of the first connecting rod (711) is detachably fixed with the parallel die cavity part (50), and the lower end of the first connecting rod is detachably fixed with the first connecting piece (61); the tube body (31) of the first group of mouthpiece (G1) is detachably fixed with the first adapter (61).

5. The screen printing die of claim 4, further comprising a first fastening member (721), wherein the nozzle member (30) further comprises a side nozzle (33), the side nozzle (33) is connected to the sidewall of the tube body (31) and is communicated with the inner cavity of the tube body (31), the lower end of the tube body (31) is formed with an opening, and the inner wall surface of the lower end opening of the tube body (31) is formed with an internal thread; the lower end of the first adapter (61) corresponding to the pipe body (31) is provided with a first through hole (611), and the first fastener (721) penetrates through the first through hole (611) to be in threaded connection with the lower end opening of the pipe body (31) and is sealed.

6. The screen printing mold of claim 4,

the screen printing die further comprises a hoop (73), a second fastening piece (722) and a third fastening piece (723), the parallel die cavity piece (50) is provided with a first screw hole (51) corresponding to the first connecting rod (711), and the upper end of the first connecting rod (711) is in threaded connection with the first screw hole (51);

the first connecting piece (61) is provided with a second through hole (613) corresponding to the first connecting rod (711), the first connecting rod (711) penetrates through the second through hole (613), and the lower end of the first connecting rod (711) extends out of the first connecting piece (61);

the hoop (73) is provided with a trepan (731) and a clamping opening (732) communicated with the trepan (731), and the trepan (731) is sleeved with the first connecting rod (711); the outer peripheral surface of the hoop (73) is provided with a second screw hole (733) and a third through hole (734) corresponding to the clamping opening (732) respectively, and the second fastening piece (722) penetrates through the third through hole (734) to be in threaded connection with the second screw hole (733);

the hoop (73) is further provided with a fourth through hole (735) which penetrates through the hoop vertically, the first rotating piece (61) is provided with a third screw hole (625) corresponding to the fourth through hole (735), and the third fastening piece (723) penetrates through the fourth through hole (735) to be in threaded connection with the third screw hole (625).

7. A screen printing mould as claimed in claim 3, characterized in that the side walls of said first mould cavity (21) are formed with venting structures (211); the exhaust structure (211) comprises a plurality of exhaust gaps, the exhaust gaps are positioned on two sides of the first mold cavity (21) on the Y axis, and the first mold cavity (21) is positioned on the X axis and is far away from one side of the second mold cavity (22).

8. A screen printing mould as claimed in claim 1 or 2, characterized in that the screen printing mould comprises a base plate (40) and a plurality of inclined mould cavity members (80a, 80b), a plurality of inclined mould cavity members (80a, 80b) being mounted on the base plate (40), and a plurality of inclined mould cavity members (80a, 80b) being arranged at intervals along the X-axis, the second mould cavities (22) being formed dispersedly on a plurality of inclined mould cavity members (80a, 80b), the bottom surfaces of the second mould cavities (22) being arranged obliquely with respect to the base plate (40).

9. The screen printing die of claim 8,

a gap is formed between at least a lower surface of the inclined cavity member (80a) of the plurality of inclined cavity members (80a, 80b) close to the first cavity (21) and an upper surface of the base plate (40); the silk-screen mould further comprises a second adaptor (62) and a plurality of second connecting rods (712), wherein,

The second adaptor (62) is arranged below the inclined die cavity part (80a), and the second connecting rods (712) and the tube bodies (31) of the second group of suction nozzle parts (G2) are positioned between the inclined die cavity part (80a) and the second adaptor (62);

the upper end of the second connecting rod (712) is detachably fixed with the inclined die cavity part (80a), and the lower end of the second connecting rod is detachably fixed with the second adaptor (62); the tube body (31) of the second group of suction nozzle pieces (G2) is detachably fixed with the second adaptor piece (62).

10. The screen printing die of claim 9, wherein the upper surface of the second adaptor (62) is parallel to the substrate (40), the upper surface of the second adaptor (62) is provided with an upper groove (621) corresponding to the tube body (31) of the second group of suction nozzles (G2), the bottom surface of the upper groove (621) is parallel to the bottom surface of the second die cavity (22), and the lower end surface of the tube body (31) is in limit abutment with the bottom surface of the upper groove (621).

11. The screen printing die of claim 10,

the screen printing die further comprises a fourth fastening piece (724), the suction nozzle piece (30) further comprises a side nozzle (33), the side nozzle (33) is connected to the side wall of the tube body (31) and communicated with the inner cavity of the tube body (31), an opening is formed in the lower end of the tube body (31), and internal threads are formed on the inner wall surface of the opening in the lower end of the tube body (31);

A fifth through hole (623) is formed in the bottom surface of the upper groove (621) corresponding to the lower end of the pipe body (31), the lower end surface of the pipe body (31) is in limit abutting joint with the bottom surface of the upper groove (621), and the fourth fastening piece (724) penetrates through the fifth through hole (623) to be in threaded connection with the lower end opening of the pipe body (31) and is sealed;

the lower surface of the inclined die cavity piece (80a) is provided with a avoiding groove (81), the avoiding groove (81) is communicated with the vacuumizing hole (23) and the side surface, facing the first die cavity (21), of the inclined die cavity piece (80a), and the side nozzle (33) is located in the avoiding groove (81).

12. The screen printing die of claim 9, further comprising a fifth fastening member, wherein the second adaptor (62) is elongated along the Y axis, a sixth through hole (624) is provided at each of two ends of the second adaptor (62) corresponding to one of the second connecting rods (712), and third screw holes (625) communicating with the adjacent sixth through holes (624) are provided at two end surfaces of the second adaptor (62) on the Y axis; the inclined die cavity part (80a) is provided with a fourth screw hole (82) corresponding to the second connecting rod (712); the upper end of the second connecting rod (712) is in threaded connection with the fourth screw hole (82), and the lower end of the second connecting rod is matched with the sixth through hole (624); the fifth fastener is in threaded fit with the third screw hole (625), and the inner end of the fifth fastener is in limit abutting joint with the second connecting rod (712).

13. A screen printing die as claimed in claim 9, wherein the component of the length of the tubular bodies (31) of the second group of nozzles (G2) in the Z axis is L2; in the plurality of inclined cavity pieces (80a, 80b), the distance between the lower surface of one inclined cavity piece (80a) and the upper surface of the base plate (40) is D2, D2 is smaller than L2, and the base plate (40) is provided with a position avoiding port matched with the second adaptor (62) below the inclined cavity piece (80 a).

14. The screen printing die of claim 8, wherein a plurality of the inclined die cavity members (80a, 80b) are machined from a blank having the same cross section, and a lower surface of the inclined die cavity member (80b) farthest from the first die cavity (21) among the plurality of inclined die cavity members (80a, 80b) is fitted and fixed on an upper surface of the base plate (40), and a gap is formed between a lower surface of the remaining inclined die cavity member (80a) and the upper surface of the base plate (40).

15. The screen printing mold according to claim 1 or 2,

the silk-screen mould comprises a substrate (40), a parallel mould cavity part (50) arranged opposite to the substrate (40), and a plurality of inclined mould cavity parts (80a, 80b) arranged on the substrate (40);

The first cavity (21) is formed on the parallel cavity member (50), and the bottom surface of the first cavity (21) is parallel to the substrate (40); a plurality of the inclined cavity parts (80a, 80b) are arranged at intervals along the X axis, the second cavities (22) are dispersedly formed on the plurality of the inclined cavity parts (80a, 80b), and the bottom surfaces of the second cavities (22) are arranged obliquely relative to the substrate (40);

the silk screen printing die further comprises a rotating shaft (11) and two shaft hole seats (12) fixed on the base plate (40), the two shaft hole seats (12) are located between the parallel die cavity piece (50) and the inclined die cavity piece (80a) adjacent to the parallel die cavity piece (50), and the rotating shaft (11) is pivoted with the two shaft hole seats (12).

16. The screen printing die of claim 15, further comprising two side plates (76) and an end plate (77), wherein the two side plates (76) are respectively adjacent to and opposite to two sides of the base plate (40) on the Y axis, and the parallel cavity member (50) and the inclined cavity member (80a) are located between the two side plates (76); the side plate (76) is fixedly connected with the substrate (40), the parallel cavity piece (50) and the inclined cavity pieces (80a and 80b), and a side through hole (761) is formed in the side plate (76) corresponding to the rotating shaft (11); the end plate (77) covers an opening formed by enclosing the base plate (40), the parallel die cavity piece (50) and the two side plates (76), and the end plate (77) is fixedly connected with one or more of the base plate (40), the parallel die cavity piece (50) and the two side plates (76).

17. A screen printing machine comprising a frame (300) and a screen printing die, characterized in that the screen printing die is as claimed in any one of claims 1 to 16, and the screen printing die is pivotally connected to the frame (300) by the pivot structure (10).