阅读说明：本技术 一种贵金属颗粒自动称重包装设备及其称重方法 (Automatic weighing and packaging equipment for precious metal particles and weighing method thereof ) 是由 廖汉祥 林烽先 吴卫煌 廖剑平 钟茂礼 丁强 丘学全 于 2021-07-27 设计创作，主要内容包括：本发明涉及一种贵金属颗粒自动称重包装设备及其称重方法,属于包装设备技术领域,包括支撑部,支撑部上端设置有隔离罩；隔离罩上有防护门,支撑部上端设置有上料装置,靠上料装置一端即为输入端的防护门,隔离罩内部还设置有称重装置、搬运机械手、自动真空塑封包装装置以及传送装置；传送装置从输入端到输出端依次设置有自动真空塑封包装装置、打标贴标机和视觉校对装置,贴标机外接警报装置,且打标贴标机的两侧均设置有固定在支撑部上的毛重电子秤；精密电子秤、视觉校对装置和两个毛重电子秤均与贴标机通讯连接。本发明除了上料过程之外,作业人员再无徒手接触产品,防止污染产品,且称重准确、自动化程度高。(The invention relates to an automatic weighing and packaging device for precious metal particles and a weighing method thereof, belonging to the technical field of packaging devices and comprising a supporting part, wherein the upper end of the supporting part is provided with a shielding case; the isolation cover is provided with a protective door, the upper end of the supporting part is provided with a feeding device, one end of the isolation cover close to the feeding device is the protective door of the input end, and the isolation cover is internally provided with a weighing device, a carrying manipulator, an automatic vacuum plastic packaging device and a conveying device; the conveying device is sequentially provided with an automatic vacuum plastic packaging device, a marking labeler and a vision correcting device from an input end to an output end, the labeler is externally connected with an alarm device, and both sides of the marking labeler are provided with gross weight electronic scales fixed on a supporting part; the precise electronic scale, the vision correcting device and the two gross weight electronic scales are all in communication connection with the labeling machine. Besides the feeding process, the operator does not contact the product by hands, so that the product is prevented from being polluted, the weighing is accurate, and the automation degree is high.)

1. The utility model provides a noble metal granule automatic weighing equipment for packing which characterized in that: comprises a supporting part (1), wherein the upper end of the supporting part (1) is provided with an isolation cover (2); protective doors (21) are arranged on the front, the rear, the left and the right of the isolation cover (2), a feeding device (3) used for vibrating and paving a product is arranged on one side, close to one of the protective doors (21), in the isolation cover (2), a weighing device (4) used for weighing the net weight of the product, a carrying manipulator (5) with visual identification and used for clamping and a conveying device (9) used for conveying the product are further arranged at the upper end of the supporting part (1), the conveying device (9) is arranged along the length direction of the supporting part (1), and the input end of the conveying device is close to the feeding device (3); the conveying device (9) is sequentially provided with a vacuum plastic packaging device (6) for automatically packaging products, a marking and labeling machine (7) for attaching labels to the packaged products and a visual proofreading device (8) for detecting and identifying weight information on the labels from an input end to an output end, the marking and labeling machine (7) is externally connected with an alarm device, and both sides of the marking and labeling machine (7) are provided with gross weight electronic scales (10) fixed on the supporting parts (1); the weighing device (4), the vision correcting device (8) and the two gross-weight electronic scales (10) are all connected and controlled with the marking and labeling machine (7) by PLC communication.

2. The automatic weighing and packaging device for precious metal particles as claimed in claim 1, wherein: the weighing device (4) comprises a precision electronic scale (41) for weighing the net weight of the noble metal particles and a weighing tray (42) arranged on the precision electronic scale (41), wherein a plastic sucking tray (43) for positioning and placing products is arranged in the weighing tray (42).

3. The automatic weighing and packaging device for precious metal particles as claimed in claim 2, wherein: the plastic sucking plate (43) comprises a material discharging plate (431), two clamping grooves (433) and a material discharging groove group which is arranged in a rectangular array are arranged at the upper end of the material discharging plate (431), and the material discharging groove group is formed by uniformly arranging a plurality of material discharging grooves (432) which are identical in size.

4. The automatic weighing and packaging device for precious metal particles as claimed in claim 2, wherein: a protective cover (44) is also sleeved outside the precision electronic scale (41).

5. The automatic weighing and packaging device for precious metal particles as claimed in claim 1, wherein: the feeding device (3) comprises a vibration base (31) fixed on the supporting part (1), a flexible vibration disc (32) and a feeding bin (33) are arranged at the upper end of the vibration base (31), an open slot (331) communicated with the flexible vibration disc (32) is formed in the feeding bin (33), and a backing plate (34) is arranged between the feeding bin (33) and the vibration base (31); and a limiting block (35) fixed on the vibration base (31) is further arranged on one side of the flexible vibration disc (32) far away from the feeding bin (33).

6. The automatic weighing and packaging device for precious metal particles as claimed in claim 1, wherein: the carrying manipulator (5) comprises a driving seat (51) arranged on the supporting part (1), the driving seat (51) is rotatably connected with a rotating plate (52), the free end of the rotating plate (52) is rotatably connected with a rotating seat (53), a vertical rotating rod (54) penetrates through the rotating seat (53) in a rotating mode, a fixing column (55) is arranged at the bottom end of the rotating rod (54), a telescopic cylinder (56) stretching along the vertical direction is arranged at the bottom end of the fixing column (55), a clamping jaw (57) used for clamping metal particles is arranged at the free end of the telescopic cylinder (56), and the clamping jaw (57) is made of special alloy steel with the surface roughness lower than 0.8.

7. The automatic weighing and packaging device for precious metal particles as claimed in claim 1, wherein: the top end of the isolation cover (2) is further provided with a working signal lamp (24) and a connecting rod (22), the free end of the connecting rod (22) is provided with a touch screen (23) used for controlling the feeding device (3), the carrying mechanical arm (5), the vacuum plastic packaging device (6), the marking and labeling machine (7), the vision checking device (8) and the conveying device (9) to work, and the touch screen (23) is further provided with a plurality of control buttons for auxiliary control.

8. The automatic weighing and packaging device for precious metal particles as claimed in claim 1, wherein: the bottom end of the supporting part (1) is provided with a plurality of foot cups (11) and a plurality of universal wheels (12).

9. The automatic weighing and packaging device for precious metal particles as claimed in claim 1, wherein: the surrounding protective doors (21) are all provided with door handles (211).

10. A weighing method of an automatic weighing and packaging device for precious metal particles based on claim 1, which is characterized by comprising the following steps:

s1: feeding: manually feeding the products to a feeding device (3), and paving all the products by the feeding device (3) in a vibrating manner;

s2: carrying: clamping a protective cover (44) away from a precision electronic scale (41) by a carrying manipulator (5), then placing a positioning plastic sucking disc (43) on the precision electronic scale (41), covering the precision electronic scale (41) by the protective cover (44) by the carrying manipulator (5), deducting gross weight data of the plastic sucking disc (43) after the precise electronic scale (41) is stabilized, automatically peeling the precision electronic scale (41), simultaneously transmitting the weighed gross weight information of the plastic sucking disc (43) to a marking and labeling machine (7), and then clamping the protective cover (44) away from the precision electronic scale (41) by the carrying manipulator (5) with visual identification to grab a product to the plastic sucking disc (43);

s3: primary weighing: after the plastic sucking disc (43) is filled with products or products with certain weight are placed according to the requirements of customers, a conveying manipulator (5) clamps a protective cover (44) to be sleeved outside the precision electronic scale (41), and after the indication number of the precision electronic scale (41) is not changed any more, the precision electronic scale (41) transmits the weighed first weight information to the marking and labeling machine (7);

s4: packaging: the conveying mechanical arm (5) clamps the protective cover (44) away from the precision electronic scale (41), then conveys the plastic sucking disc (43) filled with the product to the conveying device (9), and the conveying device (9) conveys the plastic sucking disc (43) filled with the product to the vacuum plastic packaging device (6) for vacuumizing, plastic packaging and thermal shrinkage packaging;

s5: and (3) secondary weighing: the conveying device (9) conveys the packaged plastic sucking disc (43) to a first gross weight electronic scale (10) for secondary weighing, and the weighed second weight information is transmitted to the marking and labeling machine (7) after the weighing is finished;

s6: printing and sticking a label: the conveying device (9) conveys the plastic sucking disc (43) which is subjected to secondary weighing to the marking and labeling machine (7), and the marking and labeling machine (7) prints the acquired first weight information and second weight information and then pastes the information on a packaging bag of the plastic sucking disc (43);

s7: weighing for three times: the conveying device (9) conveys the plastic sucking disc (43) with the labels attached to the plastic sucking disc to a second gross-weight electronic scale (10) for weighing for three times, and the second gross-weight electronic scale (10) transmits the obtained third weight information to the marking and labeling machine (7);

s8: visual shooting: the vision proofreading device (8) identifies second weight information on the label of the plastic sucking disc (43) and transmits the second weight information on the label to the marking and labeling machine (7);

s9: and (3) comparison: the marking and labeling machine (7) compares the weight information acquired in the steps S7 and S8, controls an external alarm device to give an alarm if the absolute value of the difference value of the weight information acquired in the steps S7 and S8 is larger than a set parameter value, and continues to be conveyed to a protective door (21) by a conveying device (9) to wait for manual collection if the absolute value is smaller than or equal to the set parameter value.

Technical Field

The invention relates to automatic weighing and packaging equipment for precious metal particles and a weighing method thereof, and belongs to the technical field of packaging equipment.

Background

Gold is a simple substance form of the chemical element gold (chemical element symbol Au), and is a soft, golden yellow, corrosion-resistant noble metal. Gold is one of the more rare, precious and highly appreciated metals. Gold is a very important metal in ounces in general in the world and in "two" in ancient China. The material is not only used for storing and investing special currency, but also is an important material for departments of jewelry industry, electronic industry, modern communication, aerospace industry and the like. With the development of modern society and the improvement of life quality, people have an increasing demand for collecting articles with strong ornamental value-added and value-preserving functions, and the gold is the target of most people.

The industrial high-purity gold particles are commonly called high-purity gold evaporation materials, when the industrial high-purity gold evaporation materials are sold, the high-purity gold particles need to be weighed firstly, then a certain amount of high-purity gold particles are packaged, and finally the packaging bag is labeled.

But present packaging mode generally all is manual packaging, and the manual contact is more, and work load is big, and has influenced the purity and the actual loss of gold particle to a certain extent, and is unfavorable for the safety control that the production process contains the gold material.

The small-dose full-automatic weighing and packaging machine disclosed in the Chinese utility model patent with the publication number of CN205293122U comprises a frame, a weighing mechanism, a packaging mechanism, a coding mechanism, an overweight removing device, a discharging and conveying mechanism and a lifting mechanism; this weighing machine constructs, packagine machine constructs, beat sign indicating number mechanism, overweight removing device and ejection of compact conveying mechanism all set up in the frame, this packagine machine constructs under being located weighing machine constructs, should beat sign indicating number mechanism and be located packagine machine constructs the rear side, this overweight removing device is located weighing machine constructs's delivery outlet department, this ejection of compact conveying mechanism is located packagine machine constructs's below, this hoist mechanism is located the side of frame other, hoist mechanism's lower extreme has the vibration hopper, hoist mechanism's upper end has the output material mouth, the output material mouth is located weighing machine constructs directly over.

The reference example is to weigh and package irregular material decoction pieces, but only one-time weighing process is adopted, and comparison is not carried out on weighing for the second time, so that if certain errors and errors occur in one-time weighing, early warning cannot be carried out, and defective products can occur.

Disclosure of Invention

In order to overcome the defects of more manual contact, easy pollution of noble metal particles, inaccurate actual weight and the like in the existing noble metal particle packaging process, the invention designs the noble metal particle automatic weighing and packaging equipment and the weighing method thereof.

In order to achieve the purpose, the invention adopts the following technical scheme:

an automatic weighing and packaging device for noble metal particles comprises a supporting part, wherein the upper end of the supporting part is provided with an isolation cover; protective doors are arranged on the front, the rear, the left and the right sides of the isolation cover, a feeding device used for vibrating and paving a product is arranged on one side of the interior of the isolation cover close to one of the protective doors, a weighing device used for weighing the net weight of the product, a carrying manipulator with visual identification and used for clamping and a conveying device used for conveying the product are further arranged at the upper end of the supporting part, the conveying device is arranged along the length direction of the supporting part, and the input end of the conveying device is close to the feeding device; the conveying device is sequentially provided with a vacuum plastic packaging device for automatically packaging products, a marking and labeling machine for labeling the packaged products and a visual proofreading device for detecting and identifying weight information on labels from an input end to an output end, the marking and labeling machine is externally connected with an alarm device, and both sides of the marking and labeling machine are provided with gross weight electronic scales fixed on a supporting part; the weighing device, the vision correcting device and the two gross weight electronic scales are all connected and controlled with the marking and labeling machine by PLC communication.

Furthermore, the weighing device comprises a precision electronic scale for weighing the net weight of the noble metal particles and a weighing tray arranged on the precision electronic scale, wherein a plastic sucking tray for positioning and placing products is arranged in the weighing tray.

Furthermore, the plastic sucking plate comprises a discharging plate, two clamping grooves and a discharging groove group which is arranged in a rectangular array are arranged at the upper end of the discharging plate, and the discharging groove group is formed by uniformly arranging a plurality of discharging grooves with the same size.

Furthermore, a protective cover is sleeved outside the precision electronic scale.

Furthermore, the feeding device comprises a vibration base fixed on the supporting part, a flexible vibration plate and a feeding bin are arranged at the upper end of the vibration base, an open slot communicated with the flexible vibration plate is formed in the feeding bin, and a base plate is arranged between the feeding bin and the vibration base; one side of the flexible vibration disc far away from the feeding bin is also provided with a limiting block fixed on the vibration base.

Further, the transport manipulator is including setting up the drive seat on the supporting part, it has the rotor plate to drive swivelling joint on the seat, rotor plate free end swivelling joint has the roating seat, it has vertical rotary rod to run through on the roating seat in the rotation, the bottom of rotary rod is provided with the fixed column, the fixed column bottom is provided with along the flexible telescopic cylinder of vertical direction, the telescopic cylinder free end is provided with and is used for pressing from both sides the clamping jaw of getting metal particle, and the clamping jaw is less than 0.8 special alloy steel material for roughness, avoid causing wearing and tearing and pollution to the product.

Furthermore, the top end of the isolation cover is also provided with a working signal lamp and a connecting rod, the free end of the connecting rod is provided with a touch screen used for controlling the feeding device, the carrying manipulator, the vacuum plastic packaging device, the marking and labeling machine, the vision correcting device and the conveying device to work, and the touch screen is also provided with a plurality of control buttons for auxiliary control.

Furthermore, a plurality of foot cups and a plurality of universal wheels are arranged at the bottom end of the supporting part.

Furthermore, all be provided with the doorknob on the guard gate all around.

A weighing method based on an automatic weighing and packaging device for precious metal particles comprises the following steps:

s1: feeding: manually feeding the products to a feeding device, and paving all the products by the feeding device in a vibrating manner;

s2: carrying: the method comprises the following steps that a protective cover is clamped from a precision electronic scale by a carrying manipulator, then a positioning plastic sucking disc is placed on the precision electronic scale, the protective cover is covered by the carrying manipulator, gross weight data of the plastic sucking disc are deducted after the reading of the precision electronic scale is stabilized, automatic peeling is realized by the precision electronic scale, simultaneously the weighed gross weight information of the plastic sucking disc is transmitted to a marking and labeling machine, and then the product is grabbed to the plastic sucking disc after the protective cover is clamped from the precision electronic scale by the carrying manipulator with visual identification;

s3: primary weighing: after the plastic sucking disc is filled with products or products with certain weight are placed according to the requirements of customers, the protective cover is clamped and sleeved outside the precision electronic scale by the conveying mechanical arm, after the display number of the precision electronic scale is not changed,

the precise electronic scale transmits the weighed first weight information to the marking and labeling machine;

s4: packaging: the conveying mechanical arm clamps the protective cover away from the precision electronic scale and then conveys the plastic sucking disc filled with the product to a conveying device, and the conveying device conveys the plastic sucking disc filled with the product to a vacuum plastic packaging device for vacuumizing, plastic packaging and thermal shrinkage packaging;

s5: and (3) secondary weighing: the conveying device conveys the packaged plastic sucking disc to a first gross weight electronic scale for secondary weighing, and the weighed second weight information is transmitted to the marking and labeling machine after weighing is finished;

s6: printing and sticking a label: the conveying device conveys the blister tray which is subjected to secondary weighing to a marking and labeling machine, and the marking and labeling machine prints the obtained first weight information and the obtained second weight information and then pastes the printed information on a packaging bag of the blister tray;

s7: weighing for three times: the conveying device conveys the plastic sucking disc with the label attached to the plastic sucking disc to a second gross weight electronic scale for weighing for three times, and the second gross weight electronic scale transmits the obtained third weight information to the marking and labeling machine;

s8: visual shooting: the vision proofreading device identifies and shoots second weight information on the label of the plastic sucking disc and transmits the shot second weight information on the label to the marking and labeling machine;

s9: and (3) comparison: and the marking and labeling machine compares the weight information acquired in the steps S7 and S8, controls an external alarm device to give an alarm if the absolute value of the difference value of the weight information acquired in the steps S and S is larger than the set parameter value, and continues to be conveyed to a protective door by a conveying device if the absolute value of the difference value of the weight information acquired in the steps S and S is smaller than or equal to the set parameter value to wait for manual collection.

Compared with the prior art, the invention has the following characteristics and beneficial effects:

1. the invention integrates weighing, packaging, conveying and labeling into a whole through the arrangement of the isolation hood, the feeding device, the weighing device, the carrying manipulator, the vacuum plastic packaging device, the marking and labeling machine and the conveying device, the whole process has no manual touch except the feeding process, the accuracy of data is ensured when the product is weighed, simultaneously all the components are mutually matched, the isolation hood isolates a working space, the feeding device feeds materials, accumulated product particles are shaken and dispersed through vibration, the weighing device carries out one-time weighing, the carrying manipulator carries the product particles, the vacuum plastic packaging device packages the product particles placed in the plastic suction box, the marking and labeling machine pastes the packaged product with a label and conveys the product by the conveying device, the automation degree of the working process is high, the efficiency is high, the product is prevented from being polluted, and the labor intensity of operators is reduced, the safety control of the noble metal materials in the production process is enhanced.

2. According to the invention, through the arrangement of the gross weight electronic scale and the vision correction device, the weighing data are transmitted to the marking and labeling machine, the accuracy of the final gross weight data can be ensured through the comparison of front and back weight information, accidents are avoided, if the difference value is too large, an alarm is triggered, and the inconsistency of front and back weights is avoided.

3. According to the invention, through the arrangement of the carrying manipulator with the visual recognition, product particles can be very accurately placed into the material discharge groove group arranged on the plastic suction disc from the feeding device; meanwhile, the feeding device can vibrate and shake away product particles through the arrangement of the flexible vibrating disk, so that the product particles are convenient to grasp by a manipulator; the conveying manipulator provides power for the rotating plate and the rotating seat to rotate in the horizontal direction through the driving seat, and the rotating plate can prolong the clamping range of the conveying manipulator and increase the working applicability; set up rotary rod, telescopic cylinder and clamping jaw on the roating seat simultaneously, can collect and rotate, stretch out and draw back in an organic whole for the work of transport manipulator is more high-efficient, even product granule locating position difference also can press from both sides well and get.

4. According to the invention, the weighing device is sleeved with the protection shield, so that the accuracy in the weighing process is ensured; meanwhile, the touch screen is arranged outside the isolation cover to control the work, so that the safety is realized, the non-contact in the whole product weighing process can be ensured, the working state of an internal device can be reflected by the arrangement of the working signal lamp, and the working personnel can conveniently process the abnormal working state in time; the bottom end of the supporting part is provided with the foot cup and the universal wheel, and the foot cup and the universal wheel are fixed or moved as required, so that the device is convenient and fast.

5. The whole working process of the invention is only packaged once, and the same bag is used for packaging, thus avoiding information errors.

Drawings

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

FIG. 2 is a schematic view of the interior of the cage;

FIG. 3 is a schematic view of the structure of FIG. 2 with the protective cover removed;

FIG. 4 is an enlarged partial schematic view at A of FIG. 3;

FIG. 5 is a schematic view of a construction of a blister tray;

fig. 6 is a partially enlarged schematic view at B of fig. 3;

fig. 7 is a partially enlarged schematic view at C of fig. 3.

Wherein the reference numerals are: 1. a support portion; 11. a foot cup; 12. a universal wheel; 2. an isolation cover; 21. a protective door; 211. a door handle; 22. a connecting rod; 23. a touch screen; 24. a working signal lamp; 3. a feeding device; 31. vibrating the base; 32. a flexible vibratory pan; 33. a feeding bin; 331. an open slot; 34. a base plate; 35. a limiting block; 4. a weighing device; 41. a precision electronic scale; 42. a weighing pan; 43. a plastic sucking disc; 431. placing a tray; 432. a discharging groove; 433. a clamping groove; 44. a protective cover; 5. carrying the mechanical arm; 51. a driving seat; 52. a rotating plate; 53. a rotating base; 54. rotating the rod; 55. fixing a column; 56. a telescopic cylinder; 57. a clamping jaw; 6. a vacuum plastic packaging device; 7. marking and labeling machine; 8. a vision proofreading device; 9. a conveying device; 10. gross weight electronic scale.

Detailed Description

The present invention will be described in more detail with reference to examples.

As shown in fig. 1 to 7, the automatic precious metal particle weighing and packaging device of the present embodiment, taking gold particle weighing as an example, includes a support portion 1, an isolation cover 2 is disposed at an upper end of the support portion 1, and the isolation cover 2 isolates external interference, so that gold particles are weighed as far as possible without interference, and accuracy is ensured; the bottom end of the supporting part 1 is provided with four foot cups 11 and four universal wheels 12, so that the supporting part is convenient to move and support; transparent protective doors 21 are arranged on the front, the rear, the left and the right of the isolation hood 2, wherein two opposite protective doors 21 in the length direction are respectively used as an input end and an output end, the transparent protective doors 21 can conveniently observe the working condition inside the isolation hood 2, a door handle 211 is arranged on each protective door 21, a feeding device 3 for vibrating and paving a product is arranged on one side, close to the protective door 21, inside the isolation hood 2, a weighing device 4 for weighing the net weight of the product, a carrying manipulator 5 with visual identification for clamping and carrying the product and a conveying device 9 for conveying the product from the inlet end to the outlet end are further arranged on the supporting part 1, the conveying device 9 is arranged in the length direction of the supporting part 1, and the input end is close to the feeding device 3; the conveying device 9 is sequentially provided with a vacuum plastic packaging device 6 for automatically packaging products, a marking and labeling machine 7 for labeling the packaged products and a vision proofreading device 8 for detecting weight information on the identification labels from an inlet end to an outlet end; the marking and labeling machine 7 is externally connected with an alarm device, and both sides of the marking and labeling machine 7 are provided with gross weight electronic scales 10 fixed on the supporting part 1; the weighing device 4, the vision correcting device 8 and the two gross weight electronic scales 10 are all in communication connection with the marking and labeling machine 7 through a PLC; the top end of the isolation hood 2 is also provided with a working signal lamp 24 and an L-shaped connecting rod 22, the free end of the L-shaped connecting rod 22 is provided with a touch screen 23 for controlling the feeding device 3, the carrying manipulator 5, the vacuum plastic packaging device 6, the marking labeler 7, the vision correcting device 8 and the conveying device 9 to work, and the touch screen 23 is also provided with a plurality of control buttons for auxiliary control, such as the control of the running speed, the start-stop time and the like of the conveying device 9; because the special nature of gold grain, such as the noble nature, the texture is soft etc., so must guarantee that the process of weighing does not have any external factor interference, also can not have any artifical contact, so through the setting of each device of cage 2 and cage 2 inside, can weigh the gold grain under the condition that does not have artifical contact, the accuracy of the result of weighing has been guaranteed, and still be provided with the process of weighing many times, and label the record weight information, carry out the comparison of front and back weight information again, it is in acceptable range to guarantee the mass error of weighing before and after, the accuracy of weighing has further been improved, greatly reduced the probability of the unexpected condition of appearing, the gold grain is expensive, greatly reduced the possibility of loss.

Further, the weighing device 4 comprises a precision electronic scale 41, a weighing plate 42 is arranged at the upper end of the precision electronic scale 41, a plastic sucking plate 43 used for placing products is arranged in the weighing plate 42, the plastic sucking plate 43 is colorless thermoplastic engineering plastic which is amorphous, odorless, nontoxic and highly transparent, has excellent physical and mechanical properties, and particularly has excellent impact resistance, high tensile strength, bending strength and compression strength, and the plastic sucking plate 43 is very suitable for placing gold grains and other precious metal grains are also convenient to place and take because the gold grains are soft.

Further, plastic sucking disc 43 includes blowing dish 431, blowing dish 431 upper end is provided with two and presss from both sides the blowing bank of cells 433 and be the rectangle array and arrange, the blowing bank of cells comprises a plurality of size identical blowing groove 432 align to grid, the setting of pressing from both sides the groove 433 of getting makes things convenient for transport manipulator 5 to press from both sides to get blowing dish 431, because the gold grain is cylindrical and the texture is softer, blowing groove 432's setting can block the gold grain effectively and can not give the unnecessary power of gold grain, guarantee that the gold grain can not warp, be the blowing bank of cells that the rectangle array arranged, can let the weight of blowing dish 431 of putting the gold grain more even, and put more evenly pleasing to the eye.

Particularly, be interference fit between gold grain and the storing trough 432, and the diameter of gold grain is greater than the degree of depth of storing trough 432, and the gold grain is transversely put into storing trough 432, and the purpose of doing so is for letting the gold grain have better fixed effect, and the certain distance of storing trough 432 of gold grain eminence also conveniently takes out simultaneously.

Further, the feeding device 3 comprises a vibration base 31 fixed on the support part 1, a flexible vibration disc 32 and a feeding bin 33 are arranged at the upper end of the vibration base 31, an open slot 331 communicated with the flexible vibration disc 32 is arranged on the feeding bin 33, and a backing plate 34 is arranged between the feeding bin 33 and the vibration base 31; a limiting block 35 fixed on the vibration base 31 is further arranged on one side of the flexible vibration disc 32 away from the feeding bin 33; because gold grain hardness is lower, the trace can all be drawn with the nail even to the gold grain of pure gold, so in order to guarantee the integrality of gold grain product, guarantee that gold grain shape is indeformable, need set up banding feed bin 33 during the material loading, let gold grain roll through feed bin 33 and send to flexible vibration dish 32 in, prevent that excessive collision from leading to the gold grain to warp, flexible vibration dish 32 also has certain compliance simultaneously, also can prevent that gold grain from warping because of excessive vibrations in flexible vibration dish 32, the integrality of gold grain shape has been guaranteed as far as possible.

Further, the carrying manipulator 5 comprises a driving seat 51 arranged on the supporting part 1, a horizontal rotating plate 52 is rotatably connected on the driving seat 51, a rotating seat 53 is rotatably connected at the free end of the rotating plate 52, a vertical rotating rod 54 is rotatably penetrated on the rotating seat 53, a fixing column 55 is arranged at the bottom end of the rotating rod 54, a telescopic cylinder 56 which can stretch out and draw back along the vertical direction is arranged at the bottom end of the fixing column 55, a clamping jaw 57 for clamping is arranged at the free end of the telescopic cylinder 56, the clamping jaw 57 is made of special alloy steel with the surface roughness lower than 0.8, so that the product is prevented from being worn and polluted, the carrying manipulator 5 with visual identification is required to carry due to small volume and soft texture of gold particles, and the clamping angle can be adjusted in multiple angles through the arrangement of the driving seat 51, the rotating plate 52, the rotating seat 53, the rotating rod 54, the fixing column 55, the telescopic cylinder 56 and the clamping jaw 57, adjust the best angle of getting the gold grain of clamp, conveniently press from both sides the gold grain on getting flexible vibration dish 32 and also can prevent to warp, press from both sides simultaneously and get the height and also can adjust through telescopic cylinder 56's setting, clamping jaw 57 is conveniently pressed from both sides and is got, through visual system discernment gold grain diameter, control clamping jaw 57 clamp is got and is prevented that the soft gold grain of texture from warping.

Further, the weighing device 4 is also externally provided with a protective cover 44 in a sleeved mode, and due to the high-weight property of gold particles, the weighing process needs to be guaranteed to be free of interference of any external factors, the accuracy of the weighing result is guaranteed to the maximum degree, and loss is avoided.

The weighing method based on the automatic gold grain weighing and packaging equipment comprises the following steps:

s1: feeding: manually feeding the products to a feeding device 3, and paving all the products by the feeding device 3 in a vibrating manner;

s2: carrying: the protective cover 44 is clamped away from the precision electronic scale 41 by the carrying manipulator 5, then the positioning plastic sucking disc 43 is placed on the precision electronic scale 41, the protective cover 44 is covered by the carrying manipulator 5 to the precision electronic scale 41, the gross weight data of the plastic sucking disc 43 is deducted after the reading of the precision electronic scale 41 is stabilized, the precision electronic scale 41 realizes automatic peeling, simultaneously the weighed gross weight information of the plastic sucking disc 43 is transmitted to the marking and labeling machine 7, and then the product is grabbed to the plastic sucking disc 43 after the protective cover 44 is clamped away from the precision electronic scale 41 by the carrying manipulator 5 with visual identification;

s3: primary weighing: after the plastic sucking disc 43 is filled with products or products with a certain weight are placed according to the requirements of customers, the carrying manipulator 5 clamps the protective cover 44 to be sleeved outside the precision electronic scale 41, and after the indication number of the precision electronic scale 41 is not changed any more, the precision electronic scale 41 transmits the weighed first weight information (namely the net weight of the products) to the marking and labeling machine 7;

s4: packaging: the conveying manipulator 5 clamps the protective cover 44 away from the precision electronic scale 41 and then conveys the plastic sucking disc 43 filled with the product to the conveying device 9, and the conveying device 9 conveys the plastic sucking disc 43 filled with the product to the vacuum plastic packaging device 6 for vacuumizing, plastic packaging and thermal shrinkage packaging;

s5: and (3) secondary weighing: the conveying device 9 conveys the packaged plastic sucking disc 43 to a first gross weight electronic scale 10 for secondary weighing, and after weighing is finished, the weighed second weight information (namely gross weight data with package) is transmitted to the marking and labeling machine 7;

s6: printing and sticking a label: the conveying device 9 conveys the blister tray 43 which is subjected to secondary weighing to the marking and labeling machine 7, and the marking and labeling machine 7 prints the acquired first weight information and second weight information and then pastes the printed information on a packaging bag of the blister tray 43;

s7: weighing for three times: the conveyer 9 conveys the plastic sucking disc 43 with the label attached to the second gross weight electronic scale 10 for weighing for three times, and the second gross weight electronic scale 10 transmits the obtained third weight information to the marking and labeling machine 7;

s8: visual shooting: the vision proofreading device 8 identifies the second weight information on the label of the plastic sucking disc 43 and transmits the second weight information on the label to the marking and labeling machine 7;

s9: and (3) comparison: the marking and labeling machine 7 compares the weight information acquired in the steps S7 and S8, controls an external alarm device to give an alarm if the absolute value of the difference between the weight information acquired in the steps S7 and S8 is greater than the set parameter value, and continues to be conveyed to the protective door 21 by the conveying device 9 if the absolute value is less than or equal to the set parameter value to wait for manual collection.

In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the term "connected" is to be interpreted broadly, e.g. as a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. 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.