Automatic weighing and sub-packaging equipment for bagged injection molded parts with anti-stacking function

Abstract

This invention relates to the field of weighing and packaging technology for injection molded parts, specifically to an automatic weighing and dispensing device for bagged injection molded parts with anti-stacking function. The device includes a fixed mounting frame, a first dispensing and weighing body, a second dispensing and weighing body, and a third dispensing and weighing body. These three bodies are arranged evenly and equidistantly. The fixed mounting frame is fixedly connected between the bottom outer ends of the first, second, and third dispensing and weighing bodies. The first, second, and third dispensing and weighing bodies have identical structures. This invention provides reliable anti-stacking performance, excellent weighing accuracy, and accurate sorting and conveying. It also has the ability to process multiple specifications in parallel, significantly improving the production efficiency and product quality consistency of bagged injection molded parts weighing and dispensing.

Description

Technical Field

[0001] This invention relates to the field of weighing and packaging technology for injection molded parts, specifically an automatic weighing and dispensing device for bagged injection molded parts with anti-stacking function. Background Technology

[0002] With the rapid development of the toy manufacturing industry, bagged toys need to undergo weighing, sorting and packaging after injection molding during the production process. Traditional production methods mostly use manual sorting and weighing packaging, which is not only inefficient and costly, but also difficult to guarantee weighing accuracy, which can easily lead to product weight deviation and affect product quality consistency.

[0003] Currently, some automatic weighing and packaging equipment has appeared on the market. However, in practical applications, existing devices are prone to stacking between injection molded parts during the feeding process, leading to inaccurate weighing data and increased packaging failure rate, which seriously affects production efficiency and product quality. Furthermore, after weighing, they cannot automatically complete the material guiding process based on the weighing, and cannot accurately separate, guide, transport, and package injection molded parts that do not meet quality requirements or those that meet composite standards. Therefore, an automatic weighing and packaging equipment for bagged injection molded parts with anti-stacking function is needed to solve the above problems. Summary of the Invention

[0004] To address the problems in the prior art, the present invention provides an automatic weighing and dispensing device for bagged injection molded parts with anti-stacking function.

[0005] The technical solution adopted by this invention to solve its technical problem is: an automatic weighing and dispensing device for bagged injection molded parts with anti-stacking function, comprising a fixed mounting frame, a first dispensing and weighing body, a second dispensing and weighing body, and a third dispensing and weighing body. The first dispensing and weighing body, the second dispensing and weighing body, and the third dispensing and weighing body are arranged evenly and equidistantly. The fixed mounting frame is fixedly connected between the bottom of the outer ends of the first dispensing and weighing body, the second dispensing and weighing body, and the third dispensing and weighing body have the same structure. Each of the first dispensing and weighing body includes an adapter adjustment part, an anti-stacking part, and a weighing screening part. The anti-stacking part is located at the bottom of the adapter adjustment part, and the weighing screening part is located at the end of the anti-stacking part opposite to the adapter adjustment part.

[0006] Specifically, the adapter adjustment unit includes a first limiting conveyor frame, a first supporting partition plate, a second supporting partition plate, an elastic limiting bag, a first electric push rod, a mounting adjustment plate, a second electric push rod, and a second limiting conveyor frame. The first and second limiting conveyor frames are mirror-symmetrically distributed. The two sides of the second limiting conveyor frame are slidably engaged with the two sides inside the first limiting conveyor frame. The mounting adjustment plate is fixedly installed on both sides of the second and first limiting conveyor frames. The second electric push rod is fixedly installed on both sides of the first limiting conveyor frame via the mounting adjustment plate. The front end of the second electric push rod is aligned with the mounting adjustment plate on the side of the second limiting conveyor frame. The sections are fixedly connected, the first support partition plate and the second support partition plate are slidably engaged at the bottom of the first limiting conveyor frame and the second limiting conveyor frame, and the first support partition plate is located above the second support partition plate. The first support partition plate and the second support partition plate are inserted between the bottom of the first limiting conveyor frame and the second limiting conveyor frame. The elastic limiting bag is fixedly connected between the bottom of the first limiting conveyor frame and the second limiting conveyor frame. The first electric push rod is fixedly installed on both sides of the bottom of the first limiting conveyor frame and the second limiting conveyor frame, and the front end of the first electric push rod is fixedly connected to both sides of the first support partition plate and the second support partition plate respectively.

[0007] Specifically, the anti-stacking unit includes a dispersion frame, a first electrically controlled valve, a first conveying connecting pipe, a fixed mounting plate, a conveying box, a fixed mounting disc, a second electrically controlled valve, a lifting platform, a first nozzle, a first electromagnetic force compensation weighing sensor, and a third electric push rod. The two sides of the dispersion frame are fixedly installed on the upper end of the conveying box by bolts. The first conveying connecting pipe is symmetrically fixedly installed on the bottom of both sides of the dispersion frame through the first electrically controlled valve. The fixed mounting plate is uniformly fixedly installed on the bottom of both sides of the conveying box. The lifting platform is slidably inserted through the middle of the bottom end of the conveying box. The first electromagnetic force compensation weighing sensor is fixedly installed on the upper end of the lifting platform. The second electrically controlled valve is uniformly fixedly installed inside the conveying box and is evenly distributed around the outer perimeter of the lifting platform. The first nozzle is fixedly connected to the second electrically controlled valve, and the first conveying connecting pipe communicates with the second electrically controlled valve. The fixed mounting disc is located below the conveying box. The third electric push rod is fixedly installed on the fixed mounting disc, and the upper end of the third electric push rod is fixedly connected to the middle of the bottom end of the lifting platform.

[0008] Specifically, a nozzle plate is fixedly installed on the upper part of the outer side of the conveying box, a third electrically controlled valve is uniformly fixedly installed on the outer side of the nozzle plate, and a second conveying connection pipe is fixedly connected to the outer side of the third electrically controlled valve, and the spray holes provided on the nozzle plate are located inside the conveying box.

[0009] Specifically, a pressure relief groove is provided through the upper outer side of the dispersion frame.

[0010] Specifically, the weighing and screening unit includes a fourth electric push rod, a second fixed mounting bracket, a mounting plate, a sorting frame, a limiting plate, a first guiding conveyor hopper, a third conveying connecting pipe, a fourth electrically controlled valve, a sealing and maintenance plate, a second guiding conveyor hopper, and a second electromagnetic force-compensated weighing sensor. The sealing and maintenance plate is fixedly installed on the outer end of the sorting frame by bolts. The limiting plate is slidably engaged with the inside of both ends of the sorting frame. The second fixed mounting bracket is fixedly installed on the upper end of the sorting frame. The fourth electric push rod is symmetrically fixedly installed on the second fixed mounting bracket. The two ends of the frame are fixedly connected, and the driving end of the fourth electric push rod is fixedly connected to the upper end of the limiting plate. The first and second sub-guiding conveying buckets are fixedly connected to the two ends of the sorting frame, respectively. The third conveying connecting pipe is fixedly connected to the two ends of the sorting frame through the fourth electric control valve, and the jet end of the third conveying connecting pipe is located inside the two ends of the sorting frame. The mounting plate is fixedly connected to the upper part of the side of the sorting frame away from the sealing inspection plate. The second electromagnetic force compensation weighing sensor is fixedly installed inside the bottom end of the sorting frame.

[0011] Specifically, the bottom end of the elastic limiting bag is fixedly connected to the upper end of the dispersing frame, the sorting frame is fixedly connected to the conveyor box by a mounting plate and fixing bolts, and the conveyor box is in communication with the interior of the sorting frame.

[0012] Specifically, the size and specifications of the adapter adjustment parts in the first, second, and third material dispensing and weighing bodies are different, and the material of the elastic limiting bag is high-strength polyurethane elastomer.

[0013] The beneficial effects of this invention are:

[0014] I. This invention, an automatic weighing and dispensing equipment for bagged injection molded parts with anti-stacking function, has significant advantages in overall structural design and control logic. Firstly, through the adjustable spacing between the first and second limiting conveyor frames in the adaptation and adjustment section, combined with the alternating extension and retraction of the first and second support partition plates, the device can precisely control the material feeding rhythm according to the specifications of the injection molded parts, effectively preventing stacking caused by multiple injection molded parts falling simultaneously. Secondly, the first electromagnetic force-compensated weighing sensor within the dispersion frame in the anti-stacking section can perform preliminary weighing judgment on the falling material. When an abnormal weight is detected, indicating suspected stacking, the first nozzles distributed around the perimeter will intermittently spray high-pressure airflow at high frequency to disperse the stacked injection molded parts, ensuring... The system ensures that only one injection molded part remains on the sensor at a time, awaiting delivery. A lifting platform then lowers the individual part to the conveyor box, where it is laterally blown out by high-pressure gas. This achieves orderly single-part delivery, resolving weighing inaccuracies and packaging failures caused by material stacking during the feeding process. The device employs dual electromagnetic force-compensated weighing sensors, combined with a PLC controller for real-time data processing, enabling high-precision quality detection of each injection molded part. Through a third conveying connection pipe and limit plates independently controlled at both ends of the weighing and screening section, qualified and unqualified products are automatically blown to the first or second sorting conveyor hopper based on the weighing results. This achieves precise classification, guiding, conveying, and packaging without manual intervention.

[0015] II. This device integrates three sets of different specifications of material sorting and weighing bodies, which can simultaneously adapt to the parallel operation of various injection molded parts of different sizes, greatly improving production efficiency and equipment versatility. The elastic limiting bag is made of high-strength polyurethane elastomer material, which can adapt to the adjustment of the spacing between the first and second limiting conveying frames and is not easy to break, ensuring the sealing and guiding performance and durability of the material supply channel. This invention has reliable anti-stacking effect, excellent weighing accuracy, and accurate classification and conveying, and has the ability to process multiple specifications in parallel, which can significantly improve the production efficiency and product quality consistency of bagged injection molded parts weighing and sorting. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a three-dimensional structural diagram of the main body in this invention;

[0018] Figure 2 This is a side view of the three-dimensional structure of the main body in this invention;

[0019] Figure 3 This is a schematic diagram of the first material weighing main structure in this invention;

[0020] Figure 4 This is a schematic diagram of the adapter adjustment part structure in the present invention;

[0021] Figure 5 This is a schematic diagram of the anti-stacking section structure in the present invention;

[0022] Figure 6 This is a schematic diagram of the internal structure of the dispersion frame in this invention;

[0023] Figure 7 This is a side view of the main structure of the anti-stacking part in this invention;

[0024] Figure 8 This is a schematic diagram of the weighing and screening section structure in this invention;

[0025] Figure 9 This is a schematic diagram of the internal structure of the sorting box in this invention.

[0026] In the diagram: 1-Fixed mounting frame, 2-First material distributing and weighing main body, 3-Second material distributing and weighing main body, 4-Third material distributing and weighing main body, 5-Adaptive adjustment part, 6-Anti-stacking part, 7-Weighing and screening part, 8-First limiting conveyor frame, 9-First support partition plate, 10-Second support partition plate, 11-Elastic limiting bag, 12-First electric push rod, 13-Mounting adjustment plate, 14-Second electric push rod, 15-Second limiting conveyor frame, 16-Pressure relief groove, 17-Dispersion frame, 18-First electric control valve, 19-First conveying connection pipe, 20-Fixed mounting plate, 21-Conveying box. 22-Fixed mounting plate, 23-Second electric control valve, 24-Lifting platform, 25-First nozzle, 26-First electromagnetic force compensated weighing sensor, 27-Nozzle plate, 28-Second conveying connection pipe, 29-Third electric control valve, 30-Third electric push rod, 31-Fourth electric push rod, 32-Second fixed mounting bracket, 33-Mounting fixing plate, 34-Sorting frame, 35-Limiting plate, 36-First guide conveying hopper, 37-Third conveying connection pipe, 38-Fourth electric control valve, 39-Sealed inspection plate, 40-Second guide conveying hopper, 41-Second electromagnetic force compensated weighing sensor. Detailed Implementation

[0027] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0028] The invention will be further described below with reference to the accompanying drawings.

[0029] like Figure 1-3As shown, an automatic weighing and dispensing device for bagged injection molded parts with anti-stacking function according to the present invention includes a fixed mounting frame 1, a first dispensing and weighing body 2, a second dispensing and weighing body 3, and a third dispensing and weighing body 4. The first dispensing and weighing body 2, the second dispensing and weighing body 3, and the third dispensing and weighing body 4 are arranged evenly and equidistantly. The fixed mounting frame 1 is fixedly connected between the bottom of the outer ends of the first dispensing and weighing body 2, the second dispensing and weighing body 3, and the third dispensing and weighing body 4. The first dispensing and weighing body 2, the second dispensing and weighing body 3, and the third dispensing and weighing body 4 have the same structure. Each of the first dispensing and weighing body 2, the second dispensing and weighing body 3, and the third dispensing and weighing body 4 includes an adapter adjustment part 5, an anti-stacking part 6, and a weighing and screening part 7. The anti-stacking part 6 is located at the bottom of the adapter adjustment part 5, and the weighing and screening part 7 is located at the end of the anti-stacking part 6 away from the adapter adjustment part 5. The device can be fixedly installed by the mounting frame 1. During use, the device is electrically connected to an external PLC controller.

[0030] like Figure 4As shown, the adapter adjustment unit 5 includes a first limiting conveyor frame 8, a first support partition plate 9, a second support partition plate 10, an elastic limiting bag 11, a first electric push rod 12, a mounting adjustment plate 13, a second electric push rod 14, and a second limiting conveyor frame 15. The first limiting conveyor frame 8 and the second limiting conveyor frame 15 are mirror-symmetrically distributed. The two sides of the second limiting conveyor frame 15 are slidably engaged with the two sides of the first limiting conveyor frame 8. The mounting adjustment plate 13 is fixedly installed on both sides of the second limiting conveyor frame 15 and the first limiting conveyor frame 8. The second electric push rod 14 is fixedly installed on both sides of the first limiting conveyor frame 8 through the mounting adjustment plate 13, and the front end of the second electric push rod 14 is fixedly connected to the mounting adjustment plate 13 provided on the side of the second limiting conveyor frame 15. The first support partition plate 9 and the second support partition plate 10 are slidably engaged with the bottom of the first limiting conveyor frame 8 and the second limiting conveyor frame 15, and the first support partition plate 9 is located above the second support partition plate 10. The elastic limiting bag 11 is fixedly connected between the bottom of the first limiting conveyor frame 8 and the second limiting conveyor frame 15. The first electric push rod 12 is fixedly installed on both sides of the bottom of the first limiting conveyor frame 8 and the second limiting conveyor frame 15, and the front end of the first electric push rod 12 is fixedly connected to both sides of the first support partition plate 9 and the second support partition plate 10 respectively. The distance between the second limiting conveyor frame 15 and the first limiting conveyor frame 8 can be controlled by the second electric push rod 14, which can better fit the injection molded parts and accurately guide the feeding. The first electric push rod 12 can control the first support partition plate 9 and the second support partition plate 10 to alternately extend and retract from the bottom of the first limiting conveyor frame 8 and the second limiting conveyor frame 15, which can control the injection molded parts that fall evenly into the first limiting conveyor frame 8 and the second limiting conveyor frame 15 to be discharged individually and evenly from the bottom of the first limiting conveyor frame 8 and the second limiting conveyor frame 15 as much as possible without stacking.

[0031] like Figure 5-7As shown, the anti-stacking unit 6 includes a dispersion frame 17, a first electrically controlled valve 18, a first conveying connecting pipe 19, a fixed mounting plate 20, a conveying box 21, a fixed mounting disc 22, a second electrically controlled valve 23, a lifting platform 24, a first nozzle 25, a first electromagnetic force compensation weighing sensor 26, and a third electric push rod 30. The two sides of the dispersion frame 17 are fixedly mounted on the upper end of the conveying box 21 by bolts. The first conveying connecting pipe 19 is symmetrically fixedly mounted on the bottom sides of the dispersion frame 17 via the first electrically controlled valve 18. The fixed mounting plate 20 is evenly fixedly mounted on the bottom sides of the conveying box 21. The lifting platform 24 is slidably inserted into the middle of the bottom end of the conveying box 21. The first electromagnetic force compensation weighing sensor 26 is fixedly mounted on the upper end of the lifting platform 24. The second electrically controlled valve 23 is evenly fixed... The first nozzle 25 is fixedly connected to the second electric control valve 23, and the first conveying connection pipe 19 is connected to the second electric control valve 23. The fixed mounting plate 22 is set below the conveyor box 21. The third electric push rod 30 is fixedly installed on the fixed mounting plate 22, and the upper end of the third electric push rod 30 is fixedly connected to the middle of the bottom end of the lifting platform 24. The nozzle plate 27 is fixedly installed on the upper part of the outer end of the conveyor box 21. The third electric control valve 29 is evenly fixedly installed on the outer end of the nozzle plate 27, and the outer end of the third electric control valve 29 is fixedly connected to the second conveying connection pipe 28. The spray holes on the nozzle plate 27 are located inside the conveyor box 21 and fall into the dispersing frame 17. The injection molded parts can fall onto the first electromagnetic force compensated weighing sensor 26 for weighing and detection. By detecting the weight, the approximate number of falling injection molded parts can be determined, and whether there is material stacking during the dropping process can be judged. It is connected to an external high-pressure jetting device through the first conveying connection pipe 19 and hose, so that each first nozzle 25 can spray high-pressure airflow after being controlled by the second electric control valve 23, so that the multiple injection molded parts falling on the first electromagnetic force compensated weighing sensor 26 can be dispersed. Furthermore, the first nozzle 25 sprays air at a high frequency and intermittently, so that the multiple injection molded parts entering the dispersion frame 17 fall one by one onto the first electromagnetic force compensated weighing sensor 26 for weighing and judgment. After that, the third electric push rod 30 is activated, so that the lifting platform 24 and the first electromagnetic force compensated weighing sensor 26 together with the first electromagnetic force compensated weighing sensor 26 can be lifted. A molded part on the upper surface of an electromagnetic force-compensated weighing sensor 26 is moved downwards into a conveyor box 21. The jetting device connected to the second conveying pipe 28 is activated, causing the jetting holes inside the nozzle plate 27 to eject gas. Since the jetting holes are flush with the upper surface of the first electromagnetic force-compensated weighing sensor 26, and the conveyor box 21 is separated from the internal structure of the dispersing frame 17, a molded part located on the upper surface of the first electromagnetic force-compensated weighing sensor 26 can be conveyed through the conveyor box 21 to the sorting frame 34 for fine weighing. Then, the third electric push rod 30 controls the lifting platform 24 and the first electromagnetic force-compensated weighing sensor 26 to rise again into the dispersing frame 17, completing the unloading process of a molded part from the first electromagnetic force-compensated weighing sensor 26.During this process, the second support partition 10 blocks the bottom of the first limiting conveyor frame 8 and the second limiting conveyor frame 15 until no more injection molded parts fall onto the first electromagnetic force compensation weighing sensor 26 from each of the first nozzles 25 during the movement time. At this point, it indicates that the injection molded parts in the dispersion frame 17 have been conveyed, and the injection molded parts in the first limiting conveyor frame 8 and the second limiting conveyor frame 15 need to be replenished.

[0032] A pressure relief groove 16 is provided through the upper outer side of the dispersion frame 17, which allows the high-velocity airflow to be discharged and relieved of pressure.

[0033] like Figure 8-9 As shown, the weighing and screening unit 7 includes a fourth electric push rod 31, a second fixed mounting bracket 32, a mounting plate 33, a sorting frame 34, a limiting plate 35, a first guiding conveyor hopper 36, a third conveying connecting pipe 37, a fourth electric control valve 38, a sealing inspection plate 39, a second guiding conveyor hopper 40, and a second electromagnetic force compensation weighing sensor 41. The sealing inspection plate 39 is fixedly installed on the outer end of the sorting frame 34 by bolts. The limiting plate 35 is slidably engaged with the inside of both ends of the sorting frame 34. The second fixed mounting bracket 32 ​​is fixedly installed on the upper end of the sorting frame 34. The fourth electric push rod 31 is symmetrically fixedly installed on both ends of the second fixed mounting bracket 32, and the driving end of the fourth electric push rod 31 is fixedly connected to the upper end of the limiting plate 35. The first guiding conveyor hopper 36 and the second guiding conveyor hopper 40 are respectively fixedly connected to both ends of the sorting frame 34. The third conveying connecting pipe 37 is fixedly connected to both ends of the sorting frame 34 through the fourth electric control valve 38, and the third conveying... The jet nozzles of the connecting pipe 37 are located inside both ends of the sorting frame 34. The mounting plate 33 is fixedly connected to the upper part of the side of the sorting frame 34 away from the sealing inspection plate 39. The second electromagnetic force compensation weighing sensor 41 is fixedly installed inside the bottom end of the sorting frame 34. The second electromagnetic force compensation weighing sensor 41 is laid inside the entire bottom end of the sorting frame 34. When the injection molded part is blown into the interior of the sorting frame 34, it is weighed by the second electromagnetic force compensation weighing sensor 41. Since the third conveying connecting pipes 37 set at both ends of the sorting frame 34 are respectively connected to the external high-pressure jetting equipment through hoses, the fourth electric control valve 38 can control the third conveying connecting pipes 37 set at both ends of the sorting frame 34 to spray high-pressure gas from different positions inside the sorting frame 34. This allows the injection molded part to be sprayed from different positions at both ends of the sorting frame 34 and screened and conveyed in a specified direction through the first guide conveying bucket 36 or the second guide conveying bucket 40.

[0034] The bottom end of the elastic limiting bag 11 is fixedly connected to the upper end of the dispersing frame 17. The sorting frame 34 is fixedly connected to the conveying box 21 by the mounting plate 33 and the fixing bolts. The conveying box 21 and the interior of the sorting frame 34 are connected, so that the injection molded parts conveyed in the conveying box 21 can be blown into the interior of the sorting frame 34 for fine secondary weighing.

[0035] The adapter adjustment parts 5 in the first material separating and weighing body 2, the second material separating and weighing body 3, and the third material separating and weighing body 4 are of different sizes and can be adapted to complete the material feeding and weighing process for injection molded parts of different specifications. The elastic limiting bag 11 is made of high-strength polyurethane elastomer, which allows the elastic limiting bag 11 to deform under tension without breaking.

[0036] Working principle: First, according to the specifications and dimensions of the injection molded parts to be packaged, the second electric push rod 14 drives the installation adjustment plate 13 to slide and adjust the second limiting conveyor frame 15 relative to the first limiting conveyor frame 8, adjusting the distance between the two so that the conveying channel matches the size of the injection molded parts. The trimmed injection molded parts continuously enter the first limiting conveyor frame 8 and the second limiting conveyor frame 15. In the channel formed by the first limiting conveyor frame 8 and the second limiting conveyor frame 15, the first electric push rod 12 controls the first support partition plate 9 and the second support partition plate 10 to alternately extend and retract to achieve as many individual injection molded parts as possible into the elastic limiting bag 11, so that the injection molded parts are discharged evenly from the bottom, avoiding multiple injection molded parts falling at the same time and causing material stacking. The first support partition plate 9 and the second support partition plate 10 alternately move to ensure that only one injection molded part falls into the dispersion frame 17 below each time.

[0037] After the injection molded parts fall into the dispersion frame 17, they are initially weighed on the first electromagnetic force compensation weighing sensor 26. The weight detection determines the number of fallen injection molded parts and whether there is any stacking. If the weight significantly exceeds the standard weight of a single injection molded part, stacking is determined. An external high-pressure jetting device supplies high-pressure gas into the dispersion frame 17 through the first conveying connection pipe 19 and the first electric control valve 18. The gas, controlled by the second electric control valve 23, is ejected from the first nozzle 25. Each first nozzle 25 sprays intermittently at high frequency, dispersing any potentially stacked injection molded parts on the first electromagnetic force compensation weighing sensor 26, ensuring that only one injection molded part falls onto the first electromagnetic force compensation weighing sensor 26 at a time for conveying. After the initial weighing is completed, the third electric push rod 30 is activated, driving the lifting platform 24 to descend, moving the first electromagnetic force compensation weighing sensor 26 and the single injection molded part on its upper surface downwards into the conveying box 21. At this point, because the dispersion frame 17 and the conveying box 21 are separated, other injection molded parts... The part will not fall with it. The jetting device connected to the second conveying connection pipe 28 is activated. The third electric control valve 29 is opened. The jetting hole set on the inner side of the nozzle plate 27 sprays high-pressure gas. Since the jetting hole is flush with the upper end face of the first electromagnetic force compensation weighing sensor 26, the gas blows the single injection molded part located on the upper end face of the sensor laterally into the conveying box 21, and then into the sorting frame 34. The pressure relief groove 16 opened on the outer side of the upper end of the dispersing frame 17 is used to discharge the high-velocity airflow to avoid excessive internal air pressure. After the single injection molded part is conveyed, the third electric push rod 30 controls the lifting platform 24 and the first electromagnetic force compensation weighing sensor 26 to rise again into the dispersing frame 17, ready for the next material picking. During this process, the second support partition plate 10 maintains the blocking state of the bottom of the first limiting conveying frame 8 and the second limiting conveying frame 15 until each first nozzle 25 sprays gas to confirm that no more injection molded parts fall on the first electromagnetic force compensation weighing sensor 26. At this time, it means that the injection molded parts in the dispersing frame 17 have been conveyed and need to be replenished.

[0038] After the injection molded part is blown into the sorting frame 34, it falls onto the second electromagnetic force compensated weighing sensor 41 for a second precise weighing. The second electromagnetic force compensated weighing sensor 41 is laid inside the entire bottom end of the sorting frame 34, which can perform high-precision weighing of individual injection molded parts to determine whether their quality meets the standard. The third conveying connecting pipes 37 set at both ends of the sorting frame 34 are connected to the external high-pressure jet equipment through hoses. The fourth electric control valve 38 controls the timing and position of the jetting. The fourth electric push rod 31 can drive the limit plate 35 to slide inside both ends of the sorting frame 34 to adjust the jetting guide channel. According to the weighing result of the second electromagnetic force compensated weighing sensor 41, the PLC controller determines whether the injection molded part is qualified. If the quality of the injection molded part meets the standard, the fourth electric control valve 38 on the corresponding side is activated, and high-pressure gas is sprayed out from the third conveying connecting pipe 37, blowing the injection molded part toward the first sorting guide conveying hopper 36. On one side, the parts are conveyed to the qualified product packaging station for sealing via the first guide conveyor bucket 36. If the quality of the injection molded parts does not meet the standard (too light or too heavy), the fourth electric control valve 38 on the other side is activated, and high-pressure gas blows the injection molded parts to the side of the second guide conveyor bucket 40. The parts are then conveyed to the unqualified product recycling box or rework station via the second guide conveyor bucket 40. This device is equipped with three different specifications of material sorting and weighing bodies: the first material sorting and weighing body 2, the second material sorting and weighing body 3, and the third material sorting and weighing body 4. The size of the adapter adjustment part 5 is different, which can simultaneously adapt to three different specifications of injection molded parts to complete the unloading, weighing, and packaging process, realize multi-variety parallel operation, and improve production efficiency. The sealed maintenance plate 39 facilitates the maintenance and cleaning of the inside of the sorting frame 34 by the operator. The fixed mounting plate 22 and the fixed mounting plate 20 are used to fix and install various functional components to ensure the stability of equipment operation.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic weighing and dispensing equipment for bagged injection molded parts with anti-stacking function, comprising a fixed mounting frame (1), a first dispensing and weighing body (2), a second dispensing and weighing body (3), and a third dispensing and weighing body (4), characterized in that: The first material dispensing and weighing body (2), the second material dispensing and weighing body (3), and the third material dispensing and weighing body (4) are arranged evenly and equidistantly. The fixed mounting bracket (1) is fixedly connected between the bottom of the outer ends of the first material dispensing and weighing body (2), the second material dispensing and weighing body (3), and the third material dispensing and weighing body (4). The first material dispensing and weighing body (2), the second material dispensing and weighing body (3), and the third material dispensing and weighing body (4) have the same structure. The first material dispensing and weighing body (2), the second material dispensing and weighing body (3), and the third material dispensing and weighing body (4) all include an adapter adjustment part (5), an anti-stacking part (6), and a weighing screening part (7). The anti-stacking part (6) is located at the bottom of the adapter adjustment part (5), and the weighing screening part (7) is located at the end of the anti-stacking part (6) away from the adapter adjustment part (5).

2. The automatic weighing and dispensing equipment for bagged injection molded parts with anti-stacking function according to claim 1, characterized in that: The adapter adjustment unit (5) includes a first limiting conveyor frame (8), a first support partition plate (9), a second support partition plate (10), an elastic limiting bag (11), a first electric push rod (12), a mounting adjustment plate (13), a second electric push rod (14), and a second limiting conveyor frame (15). The first limiting conveyor frame (8) and the second limiting conveyor frame (15) are mirror-symmetrically distributed. The two sides of the second limiting conveyor frame (15) are slidably engaged with the two sides of the first limiting conveyor frame (8). The mounting adjustment plate (13) is fixedly installed on both sides of the second limiting conveyor frame (15) and the first limiting conveyor frame (8). The second electric push rod (14) is fixedly installed on both sides of the first limiting conveyor frame (8) through the mounting adjustment plate (13). The front end of the second electric push rod (14) is connected to the side end of the second limiting conveyor frame (15) by the mounting adjustment plate. The section plate (13) is fixedly connected. The first support partition plate (9) and the second support partition plate (10) are slidably engaged at the bottom of the first limiting conveyor frame (8) and the second limiting conveyor frame (15). The first support partition plate (9) is located above the second support partition plate (10). The first support partition plate (9) and the second support partition plate (10) are inserted between the bottom of the first limiting conveyor frame (8) and the second limiting conveyor frame (15). The elastic limiting bag (11) is fixedly connected between the bottom of the first limiting conveyor frame (8) and the second limiting conveyor frame (15). The first electric push rod (12) is fixedly installed on both sides of the bottom of the first limiting conveyor frame (8) and the second limiting conveyor frame (15). The front end of the first electric push rod (12) is fixedly connected to both sides of the first support partition plate (9) and the second support partition plate (10).

3. The automatic weighing and dispensing equipment for bagged injection molded parts with anti-stacking function according to claim 2, characterized in that: The anti-stacking unit (6) includes a dispersing frame (17), a first electrically controlled valve (18), a first conveying connecting pipe (19), a fixed mounting plate (20), a conveying box (21), a fixed mounting disc (22), a second electrically controlled valve (23), a lifting platform (24), a first nozzle (25), a first electromagnetic force compensation weighing sensor (26), and a third electric push rod (30). The two sides of the dispersing frame (17) are fixedly installed on the upper end of the conveying box (21) by bolts. The first conveying connecting pipe (19) is symmetrically fixedly installed on the bottom of both sides of the dispersing frame (17) by the first electrically controlled valve (18). The fixed mounting plate (20) is evenly fixedly installed on the bottom of both sides of the conveying box (21). The lifting platform (24) is slidably inserted through the bottom of the conveying box (21). At the bottom center of the conveyor box (21), the first electromagnetic force compensation weighing sensor (26) is fixedly installed on the upper end of the lifting platform (24). The second electric control valve (23) is evenly fixedly installed inside the conveyor box (21) and evenly distributed around the outer periphery of the lifting platform (24). The first nozzle (25) is fixedly connected to the second electric control valve (23), and the first conveying connection pipe (19) is connected to the second electric control valve (23). The fixed mounting plate (22) is set below the conveyor box (21). The third electric push rod (30) is fixedly installed on the fixed mounting plate (22), and the upper end of the third electric push rod (30) is fixedly connected to the bottom center of the lifting platform (24).

4. The automatic weighing and dispensing equipment for bagged injection molded parts with anti-stacking function according to claim 3, characterized in that: A nozzle plate (27) is fixedly installed on the upper part of the outer side of the conveying box (21). A third electric control valve (29) is evenly fixedly installed on the outer side of the nozzle plate (27). A second conveying connection pipe (28) is fixedly connected to the outer side of the third electric control valve (29). The spray holes provided on the nozzle plate (27) are located inside the conveying box (21).

5. An automatic weighing and dispensing equipment for bagged injection molded parts with anti-stacking function according to claim 4, characterized in that: The upper outer side of the dispersion frame (17) is provided with a pressure relief groove (16).

6. The automatic weighing and dispensing equipment for bagged injection molded parts with anti-stacking function according to claim 5, characterized in that: The weighing and screening section (7) includes a fourth electric push rod (31), a second fixed mounting bracket (32), a mounting plate (33), a sorting frame (34), a limiting plate (35), a first sorting guide conveyor hopper (36), a third conveying connecting pipe (37), a fourth electric control valve (38), a sealing inspection plate (39), a second sorting guide conveyor hopper (40), and a second electromagnetic force compensation weighing sensor (41). The sealing inspection plate (39) is fixedly installed on the outer end of the sorting frame (34) by bolts. The limiting plate (35) is slidably engaged with the inside of both ends of the sorting frame (34). The second fixed mounting bracket (32) is fixedly installed on the upper end of the sorting frame (34). The fourth electric push rod (31) is symmetrically fixedly installed on the second... The two ends of the fixed mounting bracket (32) are fixedly connected, and the driving end of the fourth electric push rod (31) is fixedly connected to the upper end of the limiting plate (35). The first guide conveying bucket (36) and the second guide conveying bucket (40) are respectively fixedly connected to the two ends of the sorting frame (34). The third conveying connecting pipe (37) is fixedly connected to the two ends of the sorting frame (34) through the fourth electric control valve (38). The jet end of the third conveying connecting pipe (37) is located inside the two ends of the sorting frame (34). The mounting fixing plate (33) is fixedly connected to the upper part of the side end of the sorting frame (34) away from the sealing inspection plate (39). The second electromagnetic force compensation weighing sensor (41) is fixedly installed inside the bottom end of the sorting frame (34).

7. An automatic weighing and dispensing equipment for bagged injection molded parts with anti-stacking function according to claim 6, characterized in that: The bottom end of the elastic limiting bag (11) is fixedly connected to the upper end of the dispersing frame (17). The sorting frame (34) is fixedly connected to the conveying box (21) by the mounting plate (33) and the fixing bolts. The conveying box (21) is connected to the interior of the sorting frame (34).

8. An automatic weighing and dispensing equipment for bagged injection molded parts with anti-stacking function according to claim 7, characterized in that: The size of the adapter adjustment part (5) in the first material dispensing and weighing body (2), the second material dispensing and weighing body (3) and the third material dispensing and weighing body (4) are different, and the elastic limiting bag (11) is made of high-strength polyurethane elastomer.

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