CN113710003B

CN113710003B - Sandwich is tin cream printing device for SMT technology

Info

Publication number: CN113710003B
Application number: CN202110968223.7A
Authority: CN
Inventors: 何宁宁
Original assignee: CK TELECOM TECHNOLOGY EQUIPMENT (HEYUAN) CO LTD
Current assignee: CK TELECOM TECHNOLOGY EQUIPMENT (HEYUAN) CO LTD
Priority date: 2021-08-23
Filing date: 2021-08-23
Publication date: 2023-01-13
Anticipated expiration: 2041-08-23
Also published as: CN113710003A

Abstract

The invention relates to the technical field of solder paste printing machines, in particular to a solder paste printing device for a sandwich SMT (surface mount technology), which comprises a printing machine body, wherein a steel mesh clamping module and a coating module are installed at the top end of the printing machine body, the top surface of the printing machine body is fixedly connected with a fixing mechanism, the fixing mechanism comprises a linear conveying rail, and a moving end of the linear conveying rail is fixedly connected with a fixing piece. According to the invention, through the arrangement of the lower clamp, the support barrel supports the plate, so that the element on the bottom surface of the plate is not in contact with the bearing plate, the element is prevented from being extruded during printing, through the arrangement of the support column, the extrusion spring and the reset spring, the steel mesh extrudes the support column to move downwards and is attached to the top surface of the plate, the extrusion spring extrudes the plate through the upper clamp to enable the plate to be extruded and attached to the steel mesh, the printing of the plates with different thicknesses is realized, the descending distance of the steel mesh clamping module is fixed when the plates with different thicknesses are printed, frequent adjustment is not needed, and the efficiency is improved.

Description

Sandwich is tin cream printing device for SMT technology

Technical Field

The invention relates to the technical field of solder paste printing machines, in particular to a solder paste printing device for a sandwich SMT (surface mount technology) process.

Background

The sandwich SMT process is a process of independently mounting and pasting elements on a plurality of PCBs, then overlaying and welding the PCBs through the SMT process, wherein one is a daughter board for mounting and pasting the elements, the other is an adapter board, the other is a mainboard, the daughter board and the mainboard mount and paste the elements firstly, the daughter board is firstly assembled in the adapter board through the SMT mounting process, then a module formed by combining the daughter board and the adapter board is mounted in the mainboard again, the three boards have the characteristics that the external profiles and the positions of positioning holes are the same, and the like, and wherein solder paste printing needs to be completed on the front side and the back side of the three boards successively.

Current tin cream printing device when printing panel, directly places panel on bearing the mesa, crushes the component easily when printing the panel another side that has the component to a side subsides, and is comparatively difficult when printing the panel to different thickness for need adjust the steel mesh anchor clamps respectively and scribble the removal parameter of leftover of bolt of cloth when printing daughter board, keysets and mainboard, inconvenient use, printing efficiency is lower.

Disclosure of Invention

In order to overcome the technical problems, the invention aims to provide a solder paste printing device for a sandwich SMT process, wherein a lower clamp is arranged, one surface of a circuit board, to which a component is attached, faces downwards, mounting holes in the board are aligned with supporting columns in an upper clamp one by one, the board is placed on the upper clamp, the top ends of the supporting columns penetrate through the mounting holes of the board to limit the board, the top of the supporting cylinders support the board, the component on the bottom surface of the board is not contacted with the supporting plate once through the supporting cylinders, the component is prevented from being extruded during printing, through the arrangement of the supporting columns, extrusion springs and return springs, a steel mesh extrudes the supporting columns to move downwards and is attached to the top surface of the board, the extrusion springs extrude the board through the upper clamp to be attached to a steel mesh, the printing of the boards with different thicknesses is realized, the descending distance of a steel mesh clamping module is fixed when the boards with different thicknesses are printed, frequent adjustment is not needed, and the efficiency is improved.

The purpose of the invention can be realized by the following technical scheme:

a tin paste printing device for a sandwich SMT process comprises a printing machine body, wherein a steel mesh clamping module and a coating module are installed at the top end of the printing machine body, a fixing mechanism is fixedly connected to the top surface of the printing machine body and comprises a linear conveying rail, a fixing part is fixedly connected to the moving end of the linear conveying rail, sliding rods are fixedly connected to two ends of the inner side wall of the fixing part, an extrusion spring is slidably connected to the outer side wall of the bottom end of each sliding rod, a connecting module is slidably connected to the top end of each sliding rod, an upper clamp is detachably and fixedly connected between the two connecting modules and comprises a first bearing plate, a plurality of supporting modules are arranged on the top surface of the first bearing plate and comprise supporting cylinders, the bottom ends of the supporting cylinders penetrate through the bearing plates and are fixedly connected with the first bearing plate, supporting columns are slidably connected to the inner walls of the supporting cylinders, and reset springs are slidably connected between the inner walls of the supporting cylinders and the outer side walls of the supporting columns, the mounting holes in the plates are aligned with the support columns on the upper clamp one by one, the plates are placed on the upper clamp, the top ends of the support columns penetrate through the mounting holes of the plates to limit the plates, the top surfaces of the support columns support the plates, the support cylinders support the plates to prevent the elements on the bottom surfaces of the plates from contacting with the bearing plates, the linear conveying track drives the fixing part and the upper clamp to move to the position below the coating module, the steel mesh clamping module moves downwards to drive the steel mesh to move downwards, the steel mesh moves downwards to contact with the top ends of the support columns firstly and extrudes the support columns to overcome the downward movement of the reset springs, the bottom ends of the support columns penetrate through the bottom ends of the support cylinders to move to the position below the support cylinders, the steel mesh is attached to the top surfaces of the plates to contact, the steel mesh continuously moves downwards to extrude the plates to enable the upper clamp and the connecting module to move downwards along the sliding rods to overcome the elasticity of the extrusion springs, steel mesh centre gripping module stops to remove, the coating module prints the tin cream through the hourglass pore pair plate top surface on the steel mesh, the realization pastes the panel another side printing tin cream that has the component to the one side, through the extrusion spring, the setting of reset spring and support column, make steel mesh extrusion support column move down and paste with the panel top surface, the extrusion spring makes it paste with the steel mesh extrusion through last anchor clamps extrusion panel and pastes, the realization is printed the panel of different thickness, thereby better adaptation deals with the daughter board, the tin cream printing of keysets and mainboard, need not frequent debugging and the down distance of switching the steel mesh, reduce repetitive operation.

Further, the method comprises the following steps: the utility model discloses a bearing plate, including connecting module, slide bar, bearing plate one, fixed ear, connecting module include one end and slide bar lateral wall sliding connection's connecting piece, the other end top surface of connecting piece has linked firmly the screw thread post, and the top of screw thread post closes soon and is connected with the internal thread knob, a lateral wall both ends of bearing plate one have all linked firmly fixed ear, fixed ear one end cup joints with the screw thread post that corresponds the side, when installing anchor clamps, cup joints two fixed ears respectively on two screw thread posts to screw the internal thread knob on the screw thread post, press from both sides the fastening and decide fixed ear through internal thread knob and connecting piece, the dismouting of anchor clamps and connecting module is convenient for more change anchor clamps.

Further, the method comprises the following steps: the one end bottom surface of connecting piece has linked firmly the sliding sleeve, and the sliding sleeve cup joints with corresponding the slide bar slip, increases the connecting piece gliding stability on the slide bar, increases simultaneously and extrudees the ascending pressure of spring to the connecting piece.

Further, the method comprises the following steps: go up the supporting anchor clamps that are provided with down of anchor clamps, lower anchor clamps include loading board two, and loading board two can dismantle with printing machine body top surface and link firmly, the top surface of loading board two links firmly a plurality of and support the post of accepting of module one-to-one, and convenient change anchor clamps down, the steel mesh extrudees the support column downwards for the support column moves down, the bottom of support column and the post contact of accepting on the anchor clamps down, make the post of accepting support a plurality of support columns on to last anchor clamps support, thereby it is spacing to a plurality of support columns, reduce the pressure that loading board one receives, correct the bending that loading board one was done here, avoid going up anchor clamps deformation influence printing under the action of gravity.

The method is further characterized in that: the bottom of the supporting cylinder is provided with a round hole, and the round hole is used for the bottom of the supporting column to pass through, so that the bottom of the supporting column can conveniently pass through the supporting cylinder to be contacted with the bearing column.

The method is further characterized in that: the height sum of the internal thread knob and the fixing lugs is smaller than the height of the supporting cylinder, and the connecting module where the internal thread knob is located and the upper clamp synchronously move up and down, so that the bottom end of the internal thread knob is lower than the top end of the supporting cylinder, contact interference between the internal thread knob and a steel mesh is avoided, and the steel mesh and the plate are convenient to fit.

The method is further characterized in that: the height of support column is greater than the height of a support section of thick bamboo for when support column top is pegged graft to the plate, the support column bottom passes the bottom of a support section of thick bamboo, with accept the post contact extrusion, avoid a support section of thick bamboo and accept the post contact, thereby directly extrude panel, lead to the panel damaged.

The method is further characterized in that: the recess that agrees with the support column bottom is seted up on the top of bearing post, the profile is the round platform shape in the recess, it is narrow down to go up wide, when the support column moves down, the support column bottom is inserted in the recess of bearing post bottom top, thereby carry out the joint to the support column, increase the joint to last anchor clamps, make when the printing, it keeps the firm state with panel to go up anchor clamps, the profile is the round platform shape in the recess simultaneously, it is narrow down to go up wide, make the support column after inserting the recess, the recess inside wall extrudees the support column, thereby carry out accurate adjustment and location to the position of last anchor clamps and panel, thereby reduce the relative skew between steel mesh and the panel, increase the accuracy nature of printing.

The invention has the beneficial effects that:

1. through the arrangement of the lower clamp, a plurality of supporting modules are arranged on the top surface of the first bearing plate, the bottom end of the supporting cylinder penetrates through the bearing plate and is fixedly connected with the first bearing plate, the inner wall of the supporting cylinder is connected with the supporting columns in a sliding mode, a reset spring is connected between the inner wall of the supporting cylinder and the outer side wall of the supporting columns in a sliding mode, one surface, attached with elements, of the circuit board is downward, mounting holes in the boards are aligned with the supporting columns in the upper clamp one by one, the boards are placed on the upper clamp, the top ends of the supporting columns penetrate through the mounting holes in the boards and limit the boards, the top surface of the supporting cylinder supports the boards, the elements on the bottom surface of the boards are not in contact with the first bearing plate through the supporting of the supporting cylinder, the supporting cylinders move through the boards through linear conveying rails, the tin paste can be conveniently printed on the other surface of the boards, and damage to the elements due to extrusion is avoided;

2. through the support column, extrusion spring and reset spring's setting, the plate is placed on last anchor clamps, the mounting hole of plate is passed on the support column top, spacing to the plate, the support tube top supports the plate, the steel mesh moves down earlier and overcomes reset spring with a plurality of support column top contacts and extrudees the support column and moves down, the bottom that the support tube was passed to the bottom of support column moves to the below of support tube, the steel mesh contacts with the laminating of plate top surface, the steel mesh continues to move down the extrusion plate and makes it move down along the elasticity that the extrusion spring was overcome to the slide bar with connection module along last anchor clamps, make steel mesh extrusion support column move down and paste with the panel top surface, extrusion spring makes it paste with the steel mesh extrusion through last anchor clamps extrusion panel and paste, realize printing to the panel of different thickness, and the down distance of steel mesh centre gripping module is all fixed when printing to the panel of different thickness, need not frequently to adjust, and efficiency is improved.

Drawings

The invention will be further described with reference to the accompanying drawings.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the overall front view structure of the present invention;

FIG. 3 is a schematic view of the fixing mechanism of the present invention;

FIG. 4 is a schematic view of the upper and lower clamps of the present invention;

FIG. 5 is a schematic view of the structure of the connection module of the present invention;

FIG. 6 is a schematic view of the internal structure of the support module of the present invention;

FIG. 7 is a schematic view of the structure of the present invention showing the contact state between the support column and the receiving column;

FIG. 8 is a cross-sectional view of the receiving post of the present invention.

In the figure: 100. a printer body; 110. a steel mesh clamping module; 120. a coating module; 200. a fixing mechanism; 210. a linear conveying track; 220. a fixing member; 221. a slide bar; 222. a compression spring; 230. a connection module; 231. a connecting member; 232. a sliding sleeve; 233. a threaded post; 234. an internal threaded knob; 300. an upper clamp; 310. a first bearing plate; 311. fixing the lug; 320. a support module; 321. a support cylinder; 322. a support column; 323. a return spring; 400. a lower clamp; 410. a second bearing plate; 420. a support post.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-8, a solder paste printing apparatus for sandwich SMT process includes a printing machine body 100, a steel mesh clamping module 110 and a coating module 120 are installed at the top end of the printing machine body 100, a fixing mechanism 200 is fixedly connected to the top surface of the printing machine body 100, the fixing mechanism 200 includes a linear conveying track 210, a fixing member 220 is fixedly connected to a moving end of the linear conveying track 210, slide bars 221 are fixedly connected to both ends of an inner side wall of the fixing member 220, an extrusion spring 222 is slidably connected to an outer side wall at the bottom end of each slide bar 221, a connecting module 230 is slidably connected to the top end of each slide bar 221, an upper clamp 300 is detachably and fixedly connected between the two connecting modules 230, the upper clamp 300 includes a first bearing plate 310, a plurality of supporting modules 320 are installed on the top surface of the first bearing plate 310, each supporting module 320 includes a supporting cylinder 321, the bottom end of each supporting cylinder 321 penetrates through the first bearing plate 310 and is fixedly connected to the first bearing plate 310, the inner wall of the supporting cylinder 321 is slidably connected with supporting columns 322, a return spring 323 is slidably connected between the inner wall of the supporting cylinder 321 and the outer side wall of the supporting column 322, the mounting holes on the plates are aligned with the supporting columns 322 on the upper clamp 300 one by one, the plates are placed on the upper clamp 300, the top ends of the supporting columns 322 penetrate through the mounting holes of the plates to limit the plates, the top surfaces of the supporting cylinders 321 support the plates, the plates are supported by the supporting cylinders 321, elements on the bottom surfaces of the plates are not contacted with the first bearing plate 310, the linear conveying track 210 drives the fixing piece 220 and the upper clamp 300 to move to the position below the coating module 120, the steel mesh clamping module 110 moves downwards to drive the steel mesh to move downwards, the steel mesh moves downwards to contact with the top ends of the plurality of supporting columns 322 and extrudes the supporting columns 322 to overcome the return spring 323 and move downwards, the bottom ends of the supporting columns 322 penetrate through the bottom ends of the supporting cylinders 321 to move to the position below the supporting cylinders 321, the steel mesh contacts with the laminating of plate top surface, the steel mesh continues to move down and extrudes the plate and makes go up anchor clamps 300 and move down along the elasticity that slide bar 221 overcome extrusion spring 222 together with connection module 230, steel mesh centre gripping module 110 stops to remove, coating module 120 prints the tin cream through the hourglass hole on the steel mesh to the plate top surface, the realization is pasted the panel another side printing tin cream that has the component to one side, through extrusion spring 222, reset spring 323 and support column 322's setting, make steel mesh extrusion support column 322 move down and paste with the panel top surface, extrusion spring 222 extrudees panel through last anchor clamps 300 and makes it paste with the steel mesh extrusion, the realization is printed the panel of different thickness.

The connecting module 230 comprises a connecting piece 231 with one end slidably connected with the outer side wall of the sliding rod 221, the top surface of the other end of the connecting piece 231 is fixedly connected with a threaded column 233, the top end of the threaded column 233 is connected with an internal threaded knob 234 in a screwing mode, both ends of one side wall of the first bearing plate 310 are fixedly connected with fixing lugs 311, one end of each fixing lug 311 is sleeved with the corresponding threaded column 233, when the clamp 300 is installed, the two fixing lugs 311 are respectively sleeved on the two threaded columns 233, the internal threaded knob 234 is screwed on the threaded column 233, the fixing lugs 311 are clamped and fixed through the internal threaded knob 234 and the connecting piece 231, the clamp 300 and the connecting module 230 are conveniently disassembled and assembled, the clamp 300 is conveniently replaced, the sliding sleeve 232 is fixedly connected to the bottom surface of one end of the connecting piece 231, the sliding sleeve 232 is slidably sleeved with the corresponding sliding rod 221, the sliding stability of the connecting piece 231 on the sliding rod 221 is improved, and the upward pressure of the extrusion spring 222 on the connecting piece 231 is increased.

Go up anchor clamps 300 and form a complete set and be provided with down anchor clamps 400, down anchor clamps 400 include two 410 of loading board, and two 410 of loading board can dismantle with printing machine body 100 top surface and link firmly, the top surface of two 410 of loading board has linked firmly a plurality of and has supported post 420 with supporting module 320 one-to-one, conveniently change down anchor clamps 400, steel mesh extrudees support column 322 downwards, make support column 322 move down, the bottom of support column 322 and the support column 420 contact that holds on the anchor clamps 400 down, make and hold post 420 and support a plurality of support columns 322 on last anchor clamps 300, thereby it is spacing to a plurality of support columns 322, reduce the pressure that loading board 310 receives, correct the bending that loading board 310 was done here, avoid going up anchor clamps 300 deformation influence printing under the effect of gravity, the round hole has been seted up to the bottom of a support section of thick bamboo 321, and the round hole is used for the support column 322 bottom to pass, make things convenient for the bottom of support column 322 to pass a support section of thick bamboo 321 and hold post 420 contact.

The sum of the heights of the internal thread knob 234 and the fixing lug 311 is smaller than the height of the support cylinder 321, so that the height of the bottom end of the internal thread knob 234 is lower than the height of the top end of the support cylinder 321, because the connecting module 230 where the internal thread knob 234 is located moves up and down synchronously with the upper clamp 300, thereby avoiding the internal thread knob 234 from interfering with the steel mesh in contact, facilitating the steel mesh to be attached to the plate, the height of the support cylinder 322 is greater than the height of the support cylinder 321, so that the top end of the support cylinder 322 is plugged into the plate, the bottom end of the support cylinder 322 passes through the bottom end of the support cylinder 321 and is in contact with the receiving cylinder 420 to be extruded, thereby avoiding the contact of the support cylinder 321 and the receiving cylinder 420, thereby directly extruding the plate, resulting in plate damage, the top end of the receiving cylinder 420 is provided with a groove engaged with the bottom end of the support cylinder 322, the inner contour of the groove is in a circular truncated cone shape, the groove is narrow, when the support cylinder 322 moves downwards, thereby clamping to the support cylinder 322 is performed, so that when printing is performed, the clamping to the upper clamp 300 and the inner side wall of the support cylinder is accurately positioned and the inner side wall of the support cylinder is accurately.

The elastic strength of the pressing spring 222 is greater than the sum of the elastic strengths of the plurality of return springs 323, so that when the steel mesh contacts only the pressing support column 322, the first bearing plate 310 and the support cylinder 321 are sufficient to resist the reaction force of the return springs 323 under the elastic force of the pressing spring 222, and thus remain stationary.

The working principle is as follows: when the device is used, one surface of a circuit board, which is adhered with components, faces downwards, mounting holes in the board are aligned with supporting columns 322 on an upper clamp 300 one by one, the board is placed on the upper clamp 300, the top ends of the supporting columns 322 penetrate through the mounting holes of the board to limit the board, the top surface of a supporting cylinder 321 supports the board, the components on the bottom surface of the board are not contacted with a first bearing plate 310 through the support of the supporting cylinder 321, a linear conveying rail 210 moves the board to the lower part of a coating module 120 by driving a fixing part 220 and the upper clamp 300 to move, a steel mesh clamping module 110 moves downwards to drive a steel mesh to move downwards, the steel mesh moves downwards to contact with the top ends of a plurality of supporting columns 322 and extrude the supporting columns 322 to overcome a reset spring 323 to move downwards, the bottom ends of the supporting columns 322 penetrate through the bottom ends of the supporting cylinders 321 to move to the lower part of the supporting cylinders 321, and the steel mesh is adhered with the top surface of the board, the steel mesh continues to move downwards to press the plate, so that the upper clamp 300 and the connecting module 230 move downwards along the sliding rod 221 against the elastic force of the pressing spring 222, finally, the bottom end of the supporting column 322 contacts with the bearing column 420 on the lower clamp 400, the steel mesh clamping module 110 stops moving, the coating module 120 prints solder paste on the top surface of the plate through a leakage hole in the steel mesh, the steel mesh clamping module 110 moves upwards to drive the steel mesh to reset and separate from the plate, the upper clamp 300 and the supporting column 322 reset under the action of the pressing spring 222 and the resetting spring 323 respectively, the linear conveying track 210 drives the upper clamp 300 and the plate to move to the other end of the linear conveying track 210, the plate is conveniently taken by the material taking equipment in the next process, after the plate is dismounted, the linear conveying track 210 drives the unloaded upper clamp 300 to return to one end of the linear conveying track 210, the plate is conveniently reloaded, and the solder paste is printed on the other side of the plate with the element attached to one side, through extrusion spring 222, reset spring 323 and support column 322's setting, make steel mesh extrusion support column 322 move down and paste with the panel top surface, extrusion spring 222 makes it paste with the steel mesh extrusion through last anchor clamps 300 extrusion panel, the realization prints the panel to different thickness, steel mesh extrusion support column 322, make support column 322 bottom with accept the contact of post 420, the realization is all fixed at the descending distance of steel mesh centre gripping module 110 when printing the panel to different thickness, need not frequent regulation, and the efficiency is improved.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.

Claims

1. The solder paste printing device for the sandwich SMT process is characterized by comprising a printing machine body (100), a steel mesh clamping module (110) and a coating module (120) are installed at the top end of the printing machine body (100), a fixing mechanism (200) is fixedly connected to the top surface of the printing machine body (100), the fixing mechanism (200) comprises a linear conveying track (210), a fixing part (220) is fixedly connected to the moving end of the linear conveying track (210), sliding rods (221) are fixedly connected to the two ends of the inner side wall of the fixing part (220), an extrusion spring (222) is slidably connected to the outer side wall of the bottom end of each sliding rod (221), a connecting module (230) is slidably connected to the top end of each sliding rod (221), an upper clamp (300) is detachably and fixedly connected between the two connecting modules (230), each upper clamp (300) comprises a bearing plate I (310), a plurality of supporting modules (320) are arranged on the top surface of each bearing plate I (310), each supporting module (320) comprises a supporting barrel (321), the bottom end of each supporting barrel (321) penetrates through each bearing plate I (310) and is fixedly connected with each bearing plate I (310), the inner wall of each supporting barrel (321) is slidably connected with a supporting spring (322), and each supporting column (323) is connected between each supporting spring (323), aligning the mounting holes in the plates with the supporting columns (322) on the upper clamp (300) one by one, placing the plates on the upper clamp (300), enabling the top ends of the supporting columns (322) to penetrate through the mounting holes of the plates to limit the plates, enabling the top surfaces of the supporting cylinders (321) to support the plates, enabling elements on the bottom surfaces of the plates not to be in contact with the first bearing plate (310) through the supporting cylinders (321), enabling the linear conveying rails (210) to move the plates to be below the coating module (120) through driving the fixing pieces (220) and the upper clamp (300), enabling the steel mesh clamping module (110) to move downwards to drive the steel mesh to move downwards, enabling the steel mesh to move downwards to be in contact with the top ends of the supporting columns (322) and to press the supporting columns (322) to overcome the reset springs (323) to move downwards, enabling the bottom ends of the supporting columns (322) to pass through the bottom ends of the supporting cylinders (321) to move to be below the supporting cylinders (321), enabling the steel mesh to be in contact with the top surfaces of the steel mesh and the plates to continuously press the lower plates so that the upper clamp (300) together with the connecting module (230) and the steel mesh to stop the movement of the steel mesh module to print paste through the coating module;

the upper clamp (300) is provided with a lower clamp (400) in a matched manner, the lower clamp (400) comprises a second bearing plate (410), the second bearing plate (410) is detachably and fixedly connected with the top surface of the printer body (100), the top surface of the second bearing plate (410) is fixedly connected with a plurality of bearing columns (420) which correspond to the support modules (320) one by one, the bottom end of the support cylinder (321) is provided with a round hole, the round hole is used for the bottom end of the support column (322) to pass through, the top end of the bearing column (420) is provided with a groove matched with the bottom end of the support column (322), the inner contour of the groove is in a circular truncated cone shape and is wide at the top and narrow at the bottom, and when the support column (322) moves downwards, the bottom end of the support column (322) is inserted into the groove at the top end of the bottom of the bearing column (420), so that the support column (322) is clamped;

connecting module (230) include one end and slide bar (221) lateral wall sliding connection's connecting piece (231), the other end top surface of connecting piece (231) has linked firmly screw thread post (233), and the top of screw thread post (233) closes soon and is connected with internal thread knob (234), a lateral wall both ends of loading board (310) have all linked firmly fixed ear (311), fixed ear (311) one end cup joints with screw thread post (233) that correspond the side, the high sum of internal thread knob (234) and fixed ear (311) is less than the height of a support section of thick bamboo (321).

2. The solder paste printing device for sandwich SMT according to claim 1, wherein a sliding sleeve (232) is fixedly connected to a bottom surface of one end of the connecting member (231), and the sliding sleeve (232) is slidably sleeved with the corresponding sliding rod (221).

3. The solder paste printing apparatus for sandwich SMT according to claim 1, wherein the height of the supporting posts (322) is greater than the height of the supporting barrel (321).