Screen frame structure of solder paste printing machine

Abstract

The screen frame structure of the solder paste printing machine comprises a left frame and a right frame which are symmetrically arranged, a left sliding groove and a right sliding groove are formed in the adjacent sides of the left frame and the right frame respectively, a steel screen can be inserted into the left sliding groove and the right sliding groove, and the same ends of the left sliding groove and the right sliding groove are provided with socket ends. A plurality of fixed inserts protruding towards one side of the right frame are arranged at the bottom of the left sliding groove, a plurality of elastic inserts protruding towards one side of the left frame are arranged at the bottom of the right sliding groove, and a plurality of left Z-axis positioning air cylinders and a plurality of right Z-axis positioning air cylinders which can be downwards inserted into the left sliding groove and the right sliding groove respectively are symmetrically arranged at the upper end of the left frame and the upper end of the right frame. A left Y-axis positioning air cylinder and a right Y-axis positioning air cylinder which can be downwards inserted into the left sliding groove and the right sliding groove respectively are arranged at the ends, away from the inserting opening end, of the upper end of the left frame and the upper end of the right frame respectively. According to the utility model, the error of the appearance of the steel mesh can be effectively compensated and limited, and the steel mesh can be stably positioned in multiple directions, so that the working stability of the steel mesh is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of tin printing machine, especially a kind of net frame structure of tin printing machine. BACKGROUND

[0002] The main function of the net frame on the tin printing machine is to fix the steel mesh and ensure its stable tension and flatness during printing. After the steel mesh is fixed with the PCB, the tin paste is accurately transferred from the steel mesh hole to the PCB pad by squeezing the tin paste with a scraper, and the precision directly affects the welding quality (such as tin paste thickness uniformity, position deviation). In addition, the net frame also needs to support quick replacement of the steel mesh to adapt to the needs of different PCB models.

[0003] The existing steel mesh will produce an active gap after being loaded into the net frame due to size error, affecting the printing accuracy, and the efficiency of replacing the steel mesh is low, and the assembly and maintenance are also troublesome. UTILITY MODEL CONTENTS

[0004] In order to solve the problem that the steel mesh in the prior art is easy to produce gap after being loaded into the net frame and affect the printing accuracy, the utility model provides a net frame structure of tin printing machine capable of quickly and stably fixing the steel mesh.

[0005] The utility model provides a kind of net frame structure of tin printing machine, including symmetrically arranged left frame and right frame, the side of the left frame and the right frame adjacent is respectively equipped with left slide groove and right slide groove for steel mesh insertion, the same end of the left slide groove and the right slide groove is equipped with spigot end, the left slide groove bottom is equipped with multiple fixed inserts projecting to the side of right frame, the right slide groove bottom is equipped with multiple elastic inserts projecting to the side of left frame, the upper end of the left frame and the upper end of the right frame are symmetrically equipped with multiple left side Z-axis positioning air cylinder and right side Z-axis positioning air cylinder capable of being respectively inserted into the left slide groove and right slide groove downwards, the upper end of the left frame and the upper end of the right frame are also respectively equipped with one left side Y-axis positioning air cylinder and right side Y-axis positioning air cylinder capable of being respectively inserted into the left slide groove and right slide groove downwards at the end away from the spigot end.

[0006] As a further improvement of the utility model, the elastic insert includes an insert body, a spring and a cover plate, the right slide groove bottom is provided with a mounting hole corresponding to the position of the elastic insert, one end of the insert body is provided with a protruding part, and the other end is provided with a spring limiting groove, the insert body, spring and cover plate are sequentially installed into the mounting hole from the outside of the right frame, and the protruding part of the insert body is placed in the right slide groove after passing through the mounting hole.

[0007] As a further improvement of the utility model, the spigot end of the left slide groove and the right slide groove is respectively provided with a guide plate, and the free end of the guide plate is provided with a chamfer structure.

[0008] As a further improvement of the utility model, the front and rear ends of the fixed insert block and the front and rear ends of the elastic insert block are provided with guiding bevels.

[0009] As a further improvement of the utility model, the right frame upper end is further provided with a detection hole in communication with the right chute, the detection hole upper end is provided with a sensor mounting bracket, and the sensor mounting bracket is provided with a sensor for detecting whether the steel mesh is inserted.

[0010] As a further improvement of the utility model, the left Z-axis positioning air cylinder, the left Y-axis positioning air cylinder, the right Z-axis positioning air cylinder and the right Y-axis positioning air cylinder are all provided with silica gel plungers at the free ends of the cylinder rods.

[0011] As a further improvement of the utility model, the left frame outer side and the right frame outer side are respectively provided with a plurality of fixing holes.

[0012] As a further improvement of the utility model, the fixed insert block and the elastic insert block are both two.

[0013] As a further improvement of the utility model, the left Z-axis positioning air cylinder and the right Z-axis positioning air cylinder are both two.

[0014] As a further improvement of the utility model, the detection hole is two, and each detection hole is provided with one sensor.

[0015] The utility model has the advantages that the utility model can effectively compensate and limit the error of the steel mesh shape, and can stably position the steel mesh in multiple directions, thereby ensuring the stability of the work. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 is the use state reference drawing of the mesh frame structure of the utility model a solder paste printing machine;

[0017] Fig. 2 is the structure schematic view of the mesh frame structure of the utility model a solder paste printing machine;

[0018] Fig. 3 is the partial exploded structure schematic view of the mesh frame structure of the utility model a solder paste printing machine;

[0019] Fig. 4 is the partial exploded structure schematic view of the mesh frame structure of the utility model a solder paste printing machine from another angle.

[0020] Reference numerals: 1-Left frame; 11-Fixed insert; 12-Left Z-axis positioning cylinder; 13-Left Y-axis positioning cylinder; 2-Right frame; 21-Elastic insert; 211-Insert body; 212-Spring; 213-Cover plate; 22-Right Z-axis positioning cylinder; 23-Right Y-axis positioning cylinder; 24-Mounting hole; 3-Steel mesh; 4-Sensor mounting bracket; 5-Sensor. Detailed Implementation

[0021] In the description of this utility model, it should be understood that if there are descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientation or positional relationship, the orientation description may be based on the orientation or positional relationship shown in the accompanying drawings. This is only for the convenience of describing this utility model and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0022] In the description of this utility model, if there is a description of quantity, "several" means one or more, "more than" means two or more, "greater than," "less than," "exceeding," etc. are understood to exclude the number itself, while "above," "below," "within," etc. are understood to include the number itself. If there is a description of "first" or "second," it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0023] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0024] like Figs. 1 to 4 As shown, this utility model discloses a frame structure for a solder paste printing machine, including a symmetrically arranged left frame 1 and right frame 2. The left frame 1 and the right frame 2 are respectively provided with a left slide groove and a right slide groove for inserting a stencil 3 on adjacent sides. The left slide groove and the right slide groove are provided with an insertion end at the same end. The bottom of the left slide groove is provided with a plurality of fixed inserts 11 protruding to the right frame 2. The bottom of the right slide groove is provided with a plurality of elastic inserts 21 protruding to the left frame 1. The upper end of the left frame 1 and the upper end of the right frame 2 are symmetrically provided with a plurality of left Z-axis positioning cylinders 12 and right Z-axis positioning cylinders 22 that can be inserted downward into the left slide groove and the right slide groove respectively. The upper end of the left frame 1 and the upper end of the right frame 2 away from the insertion end are also provided with a left Y-axis positioning cylinder 13 and a right Y-axis positioning cylinder 23 that can be inserted downward into the left slide groove and the right slide groove respectively.

[0025] In operation, first, the left Y-axis positioning cylinder 13 and the right Y-axis positioning cylinder 23 are controlled to extend the cylinder rod, and then the steel mesh 3 is inserted into the left sliding groove and the right sliding groove of the left frame 1 and the right frame 2 from the insertion end, in the process of insertion, the elastic insert 21 can extrude the steel mesh 3 to adhere to the fixed insert 11 of the left frame 1, so that when the steel mesh 3 changes in size due to shape error (such as length deviation ±0.1mm) or temperature change, the elastic insert 21 can move synchronously with the edge of the steel mesh 3 and absorb the error through elastic deformation. The reaction force of the spring 212 makes the elastic insert 21 always adhere to the edge of the steel mesh 3, automatically compensates for the X-direction size deviation, and does not need manual adjustment, thereby reducing the deviation of the steel mesh 3 under the conditions of the extrusion of the scraper movement and equipment vibration. When the steel mesh 3 is completely inserted, the front end abuts against the cylinder rod of the left Y-axis positioning cylinder 13 and the right Y-axis positioning cylinder 23, so that the Y-axis positioning of the steel mesh 3 is realized, and finally, the left Z-axis cylinder and the right Z-axis cylinder extend the cylinder rod to press and hold on the upper end of the frame of the steel mesh 3, so that the Z-axis positioning of the steel mesh 3 is realized.

[0026] The utility model not only can effectively compensate and limit the error of the steel mesh 3 shape, but also can stably position the steel mesh 3 in multiple directions, and guarantee the stability of work.

[0027] In the utility model, the elastic insert 21 includes the insert body 211, the spring 212 and the cover plate 213, the right sliding groove bottom is equipped with the installation hole 24 corresponding with the elastic insert 21 position, one end of the insert body 211 is equipped with the protruding part, the other end is equipped with the spring 212 limiting slot, the insert body 211, the spring 212 and the cover plate 213 are installed in the installation hole 24 from the right frame 2 outside in proper order, and the protruding part of the insert body 211 is placed in the right sliding groove after passing through the installation hole 24. The insert body 211 can elastically extrude the spring 212 when the steel mesh 3 is inserted, and the spring 212 also gives the insert body 211 a reaction force, so that the insert body 211 always closely adheres to the steel mesh 3.

[0028] In the utility model, the insertion end of the left sliding groove and the right sliding groove is respectively equipped with a guide plate, the free end of the guide plate is equipped with a chamfer structure, so as to conveniently guide the insertion of the steel mesh 3.

[0029] In the utility model, the front and rear ends of the fixed insert 11 and the front and rear ends of the elastic insert 21 are all equipped with guide bevels, so as to guarantee the smooth insertion and extraction of the steel mesh 3.

[0030] In the utility model, the right frame 2 upper end is also equipped with the detection hole communicating with the right sliding groove, the detection hole upper end is equipped with the sensor installation support 4, and the sensor installation support 4 is equipped with the sensor 5 for detecting whether the steel mesh 3 is inserted.

[0031] The free end of the cylinder rod of the left side Z-axis positioning air cylinder 12, the left side Y-axis positioning air cylinder 13, the right side Z-axis positioning air cylinder 22 and the right side Y-axis positioning air cylinder 23 is provided with a silica gel plunger.

[0032] The utility model discloses, the left frame 1 outside and the right frame 2's outside are equipped with a plurality of fixed holes respectively. A plurality of fixed holes are used for being connected with the left and right support beam of tin paste printing machine, play the fixed role of net frame.

[0033] The utility model discloses, the fixed insert piece 11 and the elastic insert piece 21 are two, and the positioning effect of steel net 3 is better.

[0034] The utility model discloses, the left side Z-axis positioning air cylinder 12 and the right side Z-axis positioning air cylinder 22 are two, and the pressure holding is more stable.

[0035] The utility model discloses, the detection hole is two, and each detection hole sets up one sensor 5, can detect whether steel net 3 is completely inserted.

[0036] When needing to replace steel net 3, just loosen the left side Z direction positioning air cylinder and right side Z direction positioning air cylinder can take out steel net 3, need not to disassemble net frame whole structure, and its operation is convenient and fast, guarantees processing efficiency.

[0037] The utility model discloses simple structure can automatically compensate the size deviation of steel net 3 through setting up elastic insert piece 21, guarantees initial positioning accuracy, and through multidirectional positioning, guarantees the stability of steel net 3, prevents the deviation from happening when working and influences tin paste printing effect.

[0038] The above content is further detailed description of the utility model in combination with specific preferred implementation mode, and the specific implementation of the utility model can not be limited to these descriptions. For ordinary skilled person in the art to which the utility model belongs, on the premise of not departing from the utility model concept, still can make a number of simple deductions or replacement, all should be regarded as belonging to the protection scope of the utility model.

Claims

1. A stencil structure of a solder paste printer, characterized in that: The left frame and the right frame are symmetrically arranged, and the left frame and the right frame are respectively provided with a left sliding groove and a right sliding groove on the side adjacent to each other for steel mesh insertion, the same end of the left sliding groove and the right sliding groove is provided with a socket end, the bottom of the left sliding groove is provided with a plurality of fixed inserts protruding to the side of the right frame, the bottom of the right sliding groove is provided with a plurality of elastic inserts protruding to the side of the left frame, the upper end of the left frame and the upper end of the right frame are symmetrically provided with a plurality of left Z-axis positioning cylinders and right Z-axis positioning cylinders which can be respectively inserted into the left sliding groove and the right sliding groove, and the upper end of the left frame and the upper end of the right frame are respectively provided with a left Y-axis positioning cylinder and a right Y-axis positioning cylinder which can be respectively inserted into the left sliding groove and the right sliding groove.

2. The stencil structure of the solder paste printer according to claim 1, wherein: The elastic insert includes an insert body, a spring and a cover plate, the bottom of the right sliding groove is provided with a mounting hole corresponding to the position of the elastic insert, one end of the insert body is provided with a protruding part, and the other end is provided with a spring limiting groove, the insert body, the spring and the cover plate are sequentially installed into the mounting hole from the outside of the right frame, and the protruding part of the insert body is placed in the right sliding groove after passing through the mounting hole.

3. The stencil structure of the solder paste printer according to claim 1, wherein: The socket end of the left sliding groove and the right sliding groove is respectively provided with a guide plate, and the free end of the guide plate is provided with a chamfer structure.

4. The stencil structure of the solder paste printer according to claim 1, wherein: The front and rear ends of the fixed insert and the front and rear ends of the elastic insert are both provided with a guide bevel.

5. The stencil structure of the solder paste printer according to claim 1, wherein: The upper end of the right frame is also provided with a detection hole communicating with the right sliding groove, the upper end of the detection hole is provided with a sensor mounting bracket, and the sensor mounting bracket is provided with a sensor for detecting whether the steel mesh is inserted.

6. The stencil structure of the solder paste printer according to claim 1, wherein: The free end of the cylinder rod of the left Z-axis positioning cylinder, the left Y-axis positioning cylinder, the right Z-axis positioning cylinder and the right Y-axis positioning cylinder is provided with a silica gel plunger.

7. The stencil structure of the solder paste printer according to claim 1, wherein: The outside of the left frame and the outside of the right frame are respectively provided with a plurality of fixing holes.

8. The stencil structure of the solder paste printer according to claim 1, wherein: The fixed insert and the elastic insert are both two.

9. The stencil structure of the solder paste printer according to claim 1, wherein: The left Z-axis positioning cylinder and the right Z-axis positioning cylinder are both two.

10. The stencil structure of the solder paste printer according to claim 5, wherein: The detection hole is two, and each detection hole is provided with one sensor.

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