Tin collecting mechanism of solder paste printing machine

Abstract

The utility model provides a tin collecting mechanism of a solder paste printing machine, which comprises a support, a scraper, a scraper angle adjusting mechanism, a tin foil collecting and unwinding mechanism and a lifting mechanism, the scraper is arranged at the lower end of the support, and two ends of the scraper are respectively provided with a rotating shaft. The scraper angle adjusting mechanism comprises a worm wheel fixedly connected with a rotating shaft at one end of the scraper and a worm matched with the worm wheel and fixed to the support through a bearing seat, a hand-cranking wheel is arranged at one end of the worm, the tinfoil collecting and unwinding mechanism comprises an unwinding roller, a winding roller and a guide roller, and the unwinding roller is provided with a tinfoil collecting roll. The free end of the tinfoil collecting roll bypasses the bottom of the scraper and the guide roller and then is wound on the winding roller, and a turn number sensor is arranged at one end of the guide roller. According to the tin paste recovery device, the inclination angle of the scraper can be conveniently and rapidly adjusted through the scraper angle adjusting mechanism, the tin paste recovery effect is guaranteed, the remaining amount of tin paper can be conveniently monitored through the sensor with the number of turns when the guide roller is in one section, and the labor intensity of operators is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of tin printing machine, especially to a tin printing machine's tin collection mechanism. BACKGROUND

[0002] With the rapid development of electronic industry, SMT((Surface Mounted Technology, surface assembly technology) technology is increasingly perfect, SMT technology refers to the printed circuit board pad through tin printing machine printing, coating solder paste, then the surface mount components are accurately placed on the pad coated with solder paste, according to the specific reflow temperature curve heating circuit board, let solder paste melt, its alloy composition cools and solidifies after forming a weld between components and printed circuit board and realize metallurgical connection technology. Solder paste is a new type of welding material with SMT, and can be initially adhered to the specified position, under the welding temperature, with the volatilization of solvent and part of the additive, the components to be welded and printed circuit pad are welded together to form permanent connection.

[0003] But the existing tin printing machine's recovery tin paste mechanism is through the scraper and tin collection paper to the excess tin paste recycling, wherein the scraper angle is too small, the scraper reduces the unit area of steel mesh, which may cause tin paste residue, if the scraper angle is too large, the steel mesh may be abraded or the scraper may be deformed due to pressure concentration, currently, if the scraper is adjusted, the machine needs to be deeply entered from the side to loosen the screw, which is very inconvenient to adjust, and frequent tightening of the locking screw causes the wire to slip. UTILITY MODEL CONTENTS

[0004] In order to solve the problem of inconvenient adjustment of the scraper angle in the prior art, the utility model provides a tin printing machine's tin collection mechanism which can conveniently adjust the scraper angle.

[0005] The utility model provides a kind of tin printing machine's tin collection mechanism, including support, scraper, scraper angle adjusting mechanism, tin collection paper winding and unwinding mechanism and be used for the lifting mechanism of controlling support lifting, the scraper is located at the lower end of the support and both ends are respectively equipped with one and the support rotationally connected pivot, the scraper angle adjusting mechanism includes the worm wheel of being fixedly connected with the one end pivot of the scraper and the worm that is adapted with the worm wheel and is fixed on the support by bearing seat, one end of the worm is equipped with hand wheel, the tin collection paper winding and unwinding mechanism includes the unwinding roller, winding roller and guide roller being located above the scraper and being rotationally connected with the support respectively, the unwinding roller is installed with tin collection paper roll, the free end of the tin collection paper roll is wound on the winding roller after passing through the bottom of the scraper and the guide roller, one end of the guide roller is equipped with number of turns sensor.

[0006] As a further improvement of the utility model, the lifting mechanism includes lifting support plate and lifting cylinder, two guide rails are arranged longitudinally on the lifting support plate, two sliders are arranged on the support and matched with the two guide rails, the lifting cylinder is fixed on the lifting support plate and the cylinder rod is fixedly connected with the support.

[0007] As a further improvement of the utility model, a limiting post is arranged on each side of the rotating shaft at the two ends of the scraper, and an arc-shaped limiting hole matched with the limiting post is arranged on the support.

[0008] As a further improvement of the utility model, an angle indicating scale is arranged on the side of the arc-shaped limiting hole.

[0009] As a further improvement of the utility model, a unwinding driving mechanism is arranged at one end of the unwinding roller, the unwinding driving mechanism includes a unwinding driving motor arranged on the support and a unwinding transmission mechanism for connecting the output end of the unwinding driving motor with the unwinding roller.

[0010] As a further improvement of the utility model, a winding driving mechanism is arranged at one end of the winding roller, the winding driving mechanism includes a winding driving motor arranged on the support and a winding transmission mechanism for connecting the output end of the winding driving motor with the winding roller.

[0011] As a further improvement of the utility model, the unwinding transmission mechanism and the winding transmission mechanism are both belt transmission structures.

[0012] As a further improvement of the utility model, the support includes a main support plate and side support plates arranged at the two ends of the main support plate, and the scraper, the unwinding roller, the winding roller and the guide roller are arranged between the two side support plates.

[0013] As a further improvement of the utility model, the two sliders are arranged on the main support plate, and the cylinder rod of the lifting cylinder is connected with the main support plate.

[0014] As a further improvement of the utility model, the scraper angle adjusting mechanism further includes a protective cover covering the turbine, the worm and the bearing seat, the protective cover is fixed on the side support plate, and the hand wheel is arranged outside the protective cover.

[0015] The utility model discloses the beneficial effects are: through setting scraper angle adjusting mechanism can conveniently and quickly adjust scraper inclination angle, guarantee the recovery effect of tin paste, and through the guide roller one section only ring number sensor makes it can conveniently monitor the balance of tin paper, reduces the labor intensity of operating personnel. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1It is a structure schematic view of a tin collecting mechanism of a tin paste printing machine of the utility model;

[0017] Fig. 2 It is another angle structure schematic view of a tin collecting mechanism of a tin paste printing machine of the utility model;

[0018] Fig. 3 It is still another angle structure schematic view of a tin collecting mechanism of a tin paste printing machine of the utility model;

[0019] Fig. 4 It is a partial structure schematic view of a tin collecting mechanism of a tin paste printing machine of the utility model.

[0020] The drawing reference: 11- support, 111- main body support plate, 112- side support plate, 12- doctor blade, 121- pivot, 122- limit post, 13- doctor blade angle adjusting mechanism, 131- worm wheel, 132- worm, 133- bearing seat, 134- hand wheel, 135- protective cover, 14- unwinding roller, 15- winding roller, 16- guide roller, 17- number of turns sensor, 18- unwinding drive motor, 19- winding drive motor, 21- lifting support plate, 22- lifting cylinder, 23- guide rail, 24- sliding block, 31- tin collecting paper, 32- belt transmission structure. DETAILED DESCRIPTION

[0021] In the description of the utility model, it needs to be understood that if there is a description of orientation, for example, the orientation or position relationship indicated by up, down, front, back, left, right, etc., the orientation description can be based on the orientation or position relationship shown in the drawing, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a specific orientation, a specific orientation and operation, so it cannot be understood as a limitation of the utility model.

[0022] In the description of the utility model, if there is a description of quantity, the meaning of several is one or more, the meaning of multiple is more than two, greater than, less than, more than, etc. It is understood as not including the number, above, below, within, etc. It is understood as including the number. If there is a description of first, second, it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0023] In the description of the utility model, unless otherwise explicitly limited, the words such as setting, installation, connection, etc. should be understood broadly, and the person skilled in the art can reasonably determine the specific meaning of the above words in the utility model according to the specific content of the technical scheme.

[0024] For example, Figs. 1 to 4The utility model discloses a tin collection mechanism of tin paste printing machine, including support 11, doctor blade 12, doctor blade angle adjusting mechanism 13, tin paper collection and release mechanism and be used for controlling the lifting mechanism of support 11 elevates and falls, doctor blade 12 is located support 11 lower extreme and both ends are equipped with one rotationally connected pivot 121 with support 11, doctor blade angle adjusting mechanism 13 includes the worm wheel 131 of one end pivot 121 fixed connection with doctor blade 12 and the worm 132 of worm wheel 131 adaptation and through bearing seat 133 fixed on support 11, worm 132 one end is equipped with hand wheel 134, the tin paper collection and release mechanism includes the release roll 14 of being located doctor blade 12 top and respectively with support 11 rotationally connected, winding roll 15 and guide roll 16, the release roll 14 is installed with tin paper roll, and the free end of tin paper roll is wound on winding roll 15 after passing through doctor blade 12 bottom and guide roll 16 one end of guide roll 16 is equipped with number of turns sensor 17.

[0025] When working, the lifting mechanism can drive the support 11 to move up and down, realize the action of the doctor blade 12 close to the steel mesh and away from the steel mesh, the doctor blade 12 can be adjusted by the doctor blade angle adjusting mechanism 13, and then the pressure of the doctor blade 12 is adjusted, so that the effective cleaning of the steel mesh and the effective avoidance of the wear of the steel mesh or the deformation of the doctor blade 12 are realized. The hand wheel 134 and the worm gear mechanism are used to adjust the inclination angle of the doctor blade 12, which is simple in operation, and the worm gear mechanism has a self-locking effect, so that the doctor blade 12 can be fixed after adjustment. The number of turns sensor 17 is arranged at one end of the guide roll 16, so that the remaining amount of the tin paper 31 can be measured according to the number of turns of the guide roll 16, and the remaining amount of the tin paper 31 is monitored.

[0026] In the utility model, the lifting mechanism includes a lifting support plate 21 and a lifting cylinder 22, two guide rails 23 are arranged on the lifting support plate 21 in the longitudinal direction, two sliding blocks 24 are arranged on the support 11 and matched with the two guide rails 23, and the lifting cylinder 22 is fixed on the lifting support plate 21 and the cylinder rod is fixedly connected with the support 11. The support 11 can be stably lifted, and the control is simple and convenient.

[0027] In the utility model, one limiting column 122 is arranged at each end of the doctor blade 12 on one side of the pivot 121, the limiting column 122 is arranged at one end away from the head of the doctor blade 12, and an arc-shaped limiting hole matched with the limiting column 122 is arranged on the support 11. The angle of the doctor blade 12 can be limited, and the angle is prevented from being adjusted too large.

[0028] In the utility model, an angle indicating scale is arranged on the side of the arc-shaped limiting hole, so that the angle change of the doctor blade 12 can be observed conveniently.

[0029] The utility model discloses, the unwinding roller 14 one end is equipped with unwinding drive mechanism, unwinding drive mechanism includes being equipped with unwinding drive motor 18 on the support 11 and is used for connecting the output of unwinding drive motor 18 with the unwinding transmission mechanism of unwinding roller 14. The winding roller 15 one end is equipped with winding drive mechanism, and winding drive mechanism includes being equipped with winding drive motor 19 on the support 11 and is used for connecting the output of winding drive motor 19 with the winding transmission mechanism of winding roller 15. Unwinding transmission mechanism and winding transmission mechanism are all belt drive structure 32. Unwinding drive motor 18 and winding drive motor 19 are with unwinding roller 14 and winding roller 15 on the same side of support 11, and it can reduce the space occupied, can also prevent the interference with other components.

[0030] The utility model discloses, the support 11 includes main body support plate 111 and is equipped with the side support plate 112 of both ends of main body support plate 111, the scraper 12, unwinding roller 14, winding roller 15 and guide roller 16 all are equipped between two side support plate 112. Two sliding block 24 are equipped on main body support plate 111, and the cylinder rod of lift cylinder 22 is connected with main body support plate 111.

[0031] The utility model discloses, the scraper angle adjusting mechanism 13 still includes the protection cover 135 of covering turbine, worm 132 and bearing seat 133, protection cover 135 is fixed on side support plate 112, and hand wheel 134 is equipped with outside protection cover 135.

[0032] When needing to adjust the angle of scraper 12, only need to swing hand wheel 134 can drive scraper 12 to rotate through worm and worm gear mechanism, and then realize the angle adjustment of scraper 12, and its operation is simple, and control is convenient.

[0033] The utility model discloses through setting up scraper angle adjusting mechanism 13 can conveniently and quickly adjust the inclination angle of scraper 12, guarantees the recovery effect of tin paste, and through the number of turns sensor 17 when being equipped with in guide roller 16 section, it can conveniently monitor the balance of tin paper 31, reduces the labor intensity of operating personnel.

[0034] 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 concept of the utility model, still can make a number of simple deductions or substitutions, and all should be regarded as belonging to the protection scope of the utility model.

Claims

1. A tin collection mechanism of a tin paste printer, characterized by: The device comprises a support, a scraper, a scraper angle adjusting mechanism, a tin foil winding and unwinding mechanism and a lifting mechanism for controlling the lifting of the support, the scraper is arranged at the lower end of the support and both ends are respectively provided with a rotating shaft connected with the support, the scraper angle adjusting mechanism comprises a worm wheel fixedly connected with one end of the rotating shaft of the scraper and a worm fixedly connected with the worm wheel through a bearing seat on the support, one end of the worm is provided with a hand wheel, the tin foil winding and unwinding mechanism comprises unwinding rollers, winding rollers and guide rollers arranged above the scraper and respectively rotatingly connected with the support, the unwinding roller is provided with a tin foil roll, the free end of the tin foil roll is wound on the winding roller after passing through the bottom of the scraper and the guide roller, one end of the guide roller is provided with a number of sensors.

2. The tin collection mechanism of the solder paste printer according to claim 1, wherein: The lifting mechanism comprises a lifting support plate and a lifting cylinder, the lifting support plate is provided with two longitudinal guide rails, the support is provided with two sliders matched with the two guide rails, and the lifting cylinder is fixed on the lifting support plate and the cylinder rod is fixedly connected with the support.

3. The tin collection mechanism of the tin paste printing machine according to claim 1, wherein: The two ends of the scraper are respectively provided with a limiting column on the side of the rotating shaft, and the support is provided with an arc-shaped limiting hole matched with the limiting column.

4. The tin collection mechanism of the solder paste printer according to claim 3, wherein: The side of the arc-shaped limiting hole is provided with an angle indicating scale.

5. The tin collection mechanism of the solder paste printer according to claim 1, wherein: One end of the unwinding roller is provided with an unwinding driving mechanism, the unwinding driving mechanism comprises an unwinding driving motor arranged on the support and an unwinding transmission mechanism for connecting the output end of the unwinding driving motor with the unwinding roller.

6. The tin collection mechanism of the solder paste printer according to claim 5, wherein: One end of the winding roller is provided with a winding driving mechanism, the winding driving mechanism comprises a winding driving motor arranged on the support and a winding transmission mechanism for connecting the output end of the winding driving motor with the winding roller.

7. The tin collection mechanism of the tin paste printing machine according to claim 6, wherein: The unwinding transmission mechanism and the winding transmission mechanism are both belt transmission structures.

8. The tin collection mechanism of the tin paste printing machine according to claim 2, wherein: The support comprises a main support plate and side support plates arranged at both ends of the main support plate, the scraper, the unwinding roller, the winding roller and the guide roller are arranged between the two side support plates.

9. The tin collection mechanism of the solder paste printer according to claim 8, wherein: The two sliders are arranged on the main support plate, and the cylinder rod of the lifting cylinder is connected with the main support plate.

10. The tin collection mechanism of the tin paste printing machine according to claim 8, wherein: The scraper angle adjusting mechanism further comprises a protective cover covering the turbine, worm and bearing seat, the protective cover is fixed on the side support plate, and the hand wheel is arranged outside the protective cover.

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