Feeding equipment with screening function for injection molding machine

Abstract

The invention discloses feeding equipment with a screening function for an injection molding machine, and belongs to the field of injection molding process automation. The equipment comprises a storage mechanism, a screening cylinder, a discharge bin, a lifting mechanism and a dust removal mechanism. The material storage mechanism is used for feeding and preliminarily conveying raw materials, multi-stage filtering holes are formed in the screening cylinder, the raw materials can be screened in a classified mode, and particles with different particle sizes are separated. And the discharging bin receives and distributes the screened raw materials, and the raw materials meeting the requirements are directionally conveyed to a feeding opening of the injection molding machine through the lifting mechanism. The equipment is provided with an efficient dust removal mechanism, flying dust in the screening and conveying process can be synchronously treated, an automatic sweeping mechanism is arranged to prevent screening holes from being blocked, and continuous and automatic screening and feeding of raw materials are achieved. The equipment is compact in structure and efficient in operation, effectively improves automation of injection molding production and the raw material quality control level, improves the working environment, reduces the labor intensity of workers, and is suitable for various injection molding production lines.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of injection molding equipment, and particularly relates to a feeding equipment with a screening function for an injection molding machine. BACKGROUND

[0002] An injection molding process is widely used in the production process of plastic products. In order to ensure the quality and production efficiency of the injection molding products, the feeding process of the injection molding raw materials is particularly important. At present, the common feeding equipment of the injection molding machine usually adopts a mechanical conveying mode to convey a large amount of raw materials from a storage bin to the feeding port of the injection molding machine. However, in the actual production process, the injection molding raw materials often mix with particles or impurities of different sizes due to storage and transportation. If these raw materials without effective screening directly enter the injection molding machine, not only the raw material conveying may be poor and the feeding port may be blocked, but also the uniformity and quality of the injection molding products may be affected, and even equipment failure may be caused.

[0003] Although some existing feeding equipment has a certain screening function, the following problems generally exist: firstly, the screening process and the feeding process are usually separate structures, and there is a phenomenon that the connection between the raw material screening and conveying links is not close and the process is complicated, which leads to a reduction in production efficiency; secondly, the screening device has a simple structure and usually only has single-stage screening, so it is difficult to efficiently grade and screen different particle size raw materials and meet the higher requirement for the consistency of the particle size of the raw materials in the injection molding production; thirdly, in the screening process, fine particles and dust are easily raised, which not only affects the working environment, but also may cause dust accumulation in the equipment and affect the long-term stable operation; fourthly, the existing screening device usually lacks an automatic cleaning mechanism, so the sieve holes are easily blocked by the raw materials, which affects the screening efficiency and the continuity of the subsequent feeding.

[0004] In summary, the existing feeding equipment of the injection molding machine still has certain technical defects in realizing efficient and automatic screening and conveying, avoiding dust diffusion, improving screening precision and automatic cleaning and the like. SUMMARY

[0005] In view of the problems in the prior art, the purpose of the present application is to provide a feeding equipment with a screening function for an injection molding machine, which can realize automatic screening, grading discharge and automatic conveying of raw materials and has efficient dust removal and automatic cleaning functions.

[0006] To achieve the above purpose, the present application provides the following technical scheme: A feeding equipment with a screening function for an injection molding machine, comprising a storage mechanism for feeding injection molding raw materials, a screening cylinder is arranged on one side of the storage mechanism, and the screening cylinder is used for screening the raw materials; A discharge bin is arranged at the bottom of the screening cylinder, and the discharge bin is used for receiving the raw materials after screening; One side of the discharge bin is provided with a lifting mechanism, the lifting mechanism transports the raw materials after screening to the feeding port of the injection molding machine, so that the injection molding machine performs injection molding operation; The upper part of the screening cylinder is provided with a dust removal mechanism, which is used for timely discharging the dust generated in the screening process.

[0007] Further, the storage mechanism comprises a storage bin, the shape of the storage bin is set as a horizontally placed circular truncated cone with two open ends, and the bottom of the storage bin is symmetrically provided with supporting legs; The inside of the storage bin is connected with a first inner support frame, and a rotating frame is rotatably connected to the first inner support frame; The top of the first inner support frame is provided with a material guide, and one end of the material guide extends into the screening cylinder; The outer side of the rotating frame is provided with a shovel; The shovel transports the raw materials in the storage bin to the material guide, and transports the raw materials to the screening cylinder through the material guide.

[0008] Further, the material guide is inclined, and a discharge port is formed at the bottom of one end of the material guide.

[0009] Further, the screening cylinder is uniformly provided with first filter holes and second filter holes.

[0010] Further, the inside of the screening cylinder is connected with a second inner support frame, and a driving shaft is connected to the second inner support frame, and a driving gear is sleeved at one end of the driving shaft; The inside of the first inner support frame is provided with a support rod, a linkage shaft is rotatably connected to the center of the support rod, and a driven gear is sleeved at one end of the linkage shaft, and the driven gear is engaged with the driving gear; One end of the rotating frame is connected with a connecting frame on the inner side, and the connecting frame is connected with the other end of the linkage shaft; One end of the discharge bin is provided with a first motor, and a belt is arranged between the first motor and the driving shaft.

[0011] Further, the side of the discharge bin is provided with a first discharge port, and the bottom of the discharge bin is provided with a second discharge port; The inner side of the discharge bin is provided with a partition plate, and the partition plate is located between the first discharge port and the second discharge port; The raw materials screened through the first filter holes fall into the discharge bin and are discharged through the first discharge port, and the raw materials screened through the second filter holes fall into the discharge bin and are discharged through the second discharge port; The diameter of the second filter hole is greater than the diameter of the first filter hole.

[0012] Further, the bottom of the discharge bin is provided with a support frame, and the top of both ends of the support frame is provided with a rotating shaft seat, and the driving shaft is installed on the rotating shaft seat.

[0013] Further, the lifting mechanism comprises a feeding pipe, a feeding pipe is arranged above one end of the feeding pipe, and the feeding pipe is connected with the first discharging port; The other end of the feeding pipe is provided with a discharging pipe below the other end of the feeding pipe, and the discharging pipe is connected with the feeding port of the injection molding machine.

[0014] Further, the inside of the feeding pipe is provided with an auger, and the other end of the feeding pipe is provided with a second motor, which is used to drive the auger to rotate, and the rotating auger can lift the injection molding raw materials into the position of the discharging pipe.

[0015] Further, the dust removal mechanism comprises a dust removal bin, a centrifugal fan for flow guide is arranged on the top of the dust removal bin, and a cleaning mechanism is arranged in the dust removal bin, which is used to clean the rotating screening cylinder, so as to avoid the blocking of the filter hole by the raw material particles; The dust removal bin comprises a main bin, which is arranged as a cavity with open ends, and a top cover is arranged on the top of the main bin, and dust removal pipes are arranged on the top cover at equal intervals along the length direction of the top cover, and the centrifugal fan is installed on the dust removal pipe; One end of the main bin is connected with a branch pipe, and the branch pipe is connected with the storage bin in communication; so that the dust raised in the process of feeding is discharged; The bottom of the main bin is provided with an arc-shaped cover, which covers the screening cylinder; The cleaning mechanism comprises a cross beam connected to the main bin, a positioning screw is inserted into the cross beam, a brush plate is connected to the bottom of the positioning screw, and a spring is sleeved on the positioning screw, and the spring is located between the brush plate and the cross beam.

[0016] Compared with the prior art, the beneficial effects of the present application are: The present device integrates storage, screening, grading, conveying and dust removal and other links in one, has compact structure, smooth connection of each link, effectively solves the problems of separation of screening and conveying process, complicated process and low efficiency in the traditional injection molding machine feeding equipment, realizes the automatic and efficient conveying of raw materials from feeding to the feeding port of the injection molding machine, improves the production efficiency, reduces the manual intervention, and reduces the labor cost of the feeding link.

[0017] The present device adopts a multi-stage grading screening structure, the screening cylinder is provided with first filter holes and second filter holes with different hole diameters, and different particle size raw materials can be graded and screened. Through the synergistic effect of centrifugal force and gravity, the raw materials can be accurately graded according to the particle size and fall into different channels of the discharging bin, which effectively improves the screening accuracy and efficiency, avoids the problem of unstable quality of injection molding products caused by mixed raw materials with different particle sizes, and significantly enhances the consistency and reliability of the finished products.

[0018] The device is provided with a partition plate in the discharge bin, and different particle size raw materials are discharged by reasonable layout, and are automatically conveyed to the feeding port of the injection molding machine by the lifting mechanism, so that the efficient directional feeding of graded raw materials is realized. The setting of support frame, shaft seat and other components in the device structure makes the overall operation more stable and reliable, reduces the vibration and noise in the operation process of the device, and prolongs the service life of the device.

[0019] The device integrates an efficient dust removal mechanism, and a centrifugal fan is arranged at the top of the dust removal bin. The main bin, top cover, branch pipe and arc cover cooperate to effectively collect and remove dust generated in the storage, screening and conveying processes. The cleaning mechanism adopts a spring-loaded brush plate structure, which can continuously clean the surface of the screening cylinder, prevent the screen holes from being blocked, ensure the continuous and stable operation of the screening process, improve the automation and environmental protection performance of the device, improve the workshop operation environment, and reduce the influence of dust on operators and equipment. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic view of the present application; Figure 2 is a structural schematic view of the storage mechanism of the present application; Figure 3 is a structural schematic view of the storage bin of the present application; Figure 4 is a structural schematic view of the material guide of the present application; Figure 5 is a structural schematic view of the screening cylinder of the present application; Figure 6 is a structural schematic view of the discharge bin of the present application; Figure 7 is a structural schematic view of the lifting mechanism of the present application; Figure 8 is a structural schematic view of the dust removal mechanism of the present application; Figure 9 is a structural schematic view of the cleaning mechanism of the present application.

[0021] In the drawings, the component list represented by each reference numeral is as follows: 1, storage mechanism; 11, storage bin; 111, support leg; 12, first inner support frame; 121, support rod; 122, linkage shaft; 1221, driven gear; 13, material guide; 131, discharge port; 14, rotating frame; 141, connecting frame; 15, shovel; 2, screening cylinder; 21, first filter hole; 22, second filter hole; 23, second inner support frame; 24, drive shaft; 241, drive gear; 3, discharge bin; 31, first discharge port; 32, second discharge port; 33, partition plate; 34, support frame; 341, rotating shaft seat; 35, first motor; 4, lifting mechanism; 41, feeding pipe; 411, feeding pipe; 412, discharge pipe; 42, auger; 43, second motor; 5, dust removal mechanism; 51, dust removal bin; 511, main bin; 512, top cover; 5121, dust discharge pipe; 513, branch pipe; 514, arc-shaped cover; 52, centrifugal fan; 53, cleaning mechanism; 531, cross beam; 532, positioning screw; 533, spring; 534, brush plate. DETAILED DESCRIPTION

[0022] In order to make the purpose and advantages of the present application more clear and apparent, the present application will be specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific embodiments of the present application, and does not strictly limit the specific protection scope requested by the present application.

[0023] Example 1: Referring to Figures 1-9 A feeding equipment with screening function for injection molding machine, comprising a storage mechanism 1 for feeding injection molding raw materials, a screening cylinder 2 is arranged on one side of the storage mechanism 1, the screening cylinder 2 is used for screening the raw materials; a discharge bin 3 is arranged at the bottom of the screening cylinder 2, the discharge bin 3 is used for receiving the raw materials after screening; a lifting mechanism 4 is arranged on one side of the discharge bin 3, the lifting mechanism 4 conveys the raw materials after screening to the feeding port of the injection molding machine, so that the injection molding machine can perform injection molding operation; a dust removal mechanism 5 is arranged above the screening cylinder 2, the dust removal mechanism 5 is used for timely discharging the dust generated in the screening process; the equipment can realize automatic feeding, grading screening, shunting discharge, quantitative lifting and efficient dust removal of the injection molding raw materials. In the whole process of raw material screening and conveying, the storage mechanism 1, the screening cylinder 2, the discharge bin 3, the lifting mechanism 4 and the dust removal mechanism 5 cooperate closely, effectively solving the problems of low screening precision, easy clogging of screen holes, dust leakage and insufficient automation of traditional equipment.

[0024] Referring to Figures 1-4The storage mechanism 1 comprises a storage bin 11, the shape of the storage bin 11 is set as a horizontally placed circular truncated cone with both ends open, and the bottom of the storage bin 11 is symmetrically provided with supporting legs 111; the inside of the storage bin 11 is connected with a first inner support frame 12, the first inner support frame 12 is rotatably connected with a rotating frame 14; the top of the first inner support frame 12 is provided with a material guiding piece 13, and one end of the material guiding piece 13 extends into the screening cylinder 2; the outer side of the rotating frame 14 is provided with a shovel 15; the shovel 15 transports the raw materials in the storage bin 11 into the material guiding piece 13, and transports the raw materials into the screening cylinder 2 through the material guiding piece 13; the storage bin 11 is stably supported as a whole through the supporting legs 111, the first inner support frame 12 plays a role of strengthening structure, connection and support in the inside of the storage bin 11, and ensures the normal operation of the rotating frame 14 and the shovel 15; the rotating frame 14 cooperates with the shovel 15 to realize uniform and efficient transportation of the raw materials in the storage bin 11; the material guiding piece 13 is connected with the screening cylinder 2, which ensures that the raw materials are smoothly guided into the screening cylinder 2, and the whole feeding and guiding process is automatic, efficient and continuous, which effectively improves the automation level of the feeding process.

[0025] Referring to Figures 1-4 The material guiding piece 13 is inclined, and a bottom of one end of the material guiding piece 13 is provided with a discharging port 131; the inclination angle of the material guiding piece 13 is optimized and designed to adapt to the flow characteristics of the raw materials and improve the raw material guiding efficiency; the discharging port 131 ensures that the raw materials in the storage mechanism 1 can accurately and smoothly fall into the inside of the screening cylinder 2, avoids the accumulation and blockage of the raw materials, and realizes seamless connection with the structure of the screening cylinder 2, thereby providing continuous and uniform raw material supply for the subsequent screening link.

[0026] Referring to Figure 5 The screening cylinder 2 is uniformly provided with a first filter hole 21 and a second filter hole 22; the first filter hole 21 and the second filter hole 22 are distributed on the circumferential surface of the screening cylinder 2, the hole diameters are designed to be different, which facilitates multi-stage classification screening of raw materials with different particle sizes; the hole diameter of the first filter hole 21 is smaller than that of the second filter hole 22, through the rotating movement of the screening cylinder 2, the raw materials are effectively separated through filter holes with different diameters under the joint action of centrifugal force and gravity, and smaller particles and larger particles are screened out according to the particle size, which effectively improves the screening precision and efficiency.

[0027] Referring to Figures 4-7The interior of the screening cylinder 2 is connected with a second inner support frame 23, and the second inner support frame 23 is connected with a driving shaft 24, and one end of the driving shaft 24 is sleeved with a driving gear 241; the interior of the first inner support frame 12 is provided with a support rod 121, and the center of the support rod 121 is rotationally connected with a linkage shaft 122, and one end of the linkage shaft 122 is sleeved with a driven gear 1221, and the driven gear 1221 is engaged with the driving gear 241; one end of the rotating frame 14 is connected with a connecting frame 141, and the connecting frame 141 is connected with the other end of the linkage shaft 122; one end of the discharging bin 3 is provided with a first motor 35, and the first motor 35 and the driving shaft 24 are provided with a belt; the driving shaft 24 is driven to rotate by the first motor 35, the power is transmitted through the belt, the driving gear 241 is engaged with the driven gear 1221, and the stable rotation of the screening cylinder 2 is realized; the second inner support frame 23 and the first inner support frame 12 respectively provide rigid support for the screening cylinder 2 and the storage bin 11; the rotating frame 14, the connecting frame 141, the support rod 121 and the linkage shaft 122 jointly constitute a power transmission system, so that the screening process is efficient and stable, the raw materials can be fully rubbed with the inner wall of the screening cylinder 2, and full classification screening is realized.

[0028] Referring to Figures 4-6 The side of the discharging bin 3 is provided with a first discharging port 31, and the bottom of the discharging bin 3 is provided with a second discharging port 32; the inner side of the discharging bin 3 is provided with a partition plate 33, and the partition plate 33 is located between the first discharging port 31 and the second discharging port 32; the raw materials screened through the first filter hole 21 fall into the discharging bin 3 and are discharged through the first discharging port 31, and the raw materials screened through the second filter hole 22 fall into the discharging bin 3 and are discharged through the second discharging port 32; the diameter of the second filter hole 22 is greater than that of the first filter hole 21; the partition plate 33 can spatially separate raw materials of different particle sizes, avoid mixing of raw materials of different levels, and ensure that the discharging process is efficient and clear; the first discharging port 31 and the second discharging port 32 respectively abut subsequent conveying structures, so that the multi-stage raw materials are discharged in a shunt manner, and the demand of the injection molding process for uniformity of raw material particle size is met.

[0029] Referring to Figure 6 The bottom of the discharging bin 3 is provided with a support frame 34, and the two ends of the top of the support frame 34 are provided with rotating shaft seats 341, and the driving shaft 24 is installed on the rotating shaft seats 341; the support frame 34 can enhance the overall structural strength of the discharging bin 3, and ensure that the discharging bin 3 does not deform during long-time operation; the rotating shaft seat 341 provides a rotation fulcrum for the driving shaft 24, ensures stable operation of the driving shaft 24, and cooperates with the screening cylinder 2 and the first motor 35 to realize efficient screening and discharging.

[0030] Referring to Figure 7The lifting mechanism 4 comprises a feeding pipe 41, one end of the feeding pipe 41 is provided with a feeding pipe 411 above, the feeding pipe 411 is connected with the first discharging port 31; the other end of the feeding pipe 41 is provided with a discharging pipe 412 below, the discharging pipe 412 is connected with the feeding port of the injection molding machine; the feeding pipe 41, the feeding pipe 411 and the discharging pipe 412 form a complete raw material lifting conveying channel, which can realize efficient directional lifting and accurate feeding of the screened raw material, ensure the automation and continuity of the whole feeding process, and improve the injection molding production efficiency.

[0031] Referring to Figure 7 The inside of the feeding pipe 41 is provided with an auger 42, and the other end of the feeding pipe 41 is provided with a second motor 43, which is used to drive the auger 42 to rotate, the rotating auger 42 can lift the injection molding raw material entering the inside to the position where the discharging pipe 412 is located; the auger 42 cooperates with the feeding pipe 41 to efficiently lift the raw material by the screw propulsion mode, the second motor 43 provides continuous power for the auger 42, realizes the continuous conveying of the raw material from the feeding pipe 411 to the discharging pipe 412, and solves the problems of raw material blockage and poor conveying existing in the traditional feeding equipment.

[0032] Referring to Figures 8-9, the dust removal mechanism 5 includes a dust removal bin 51, the top of the dust removal bin 51 is provided with a centrifugal fan 52 for flow guide, and the inside of the dust removal bin 51 is provided with a cleaning mechanism 53 for cleaning the rotating screening cylinder 2, so as to avoid that the raw material particles cause the filter hole to be blocked; the dust removal bin 51 includes a main bin 511, which is provided in a cavity shape with both ends being open, and the top of the main bin 511 is provided with a top cover 512, the top cover 512 is provided with dust exhaust pipes 5121 at equal intervals along the length direction of the top cover 512, and the centrifugal fan 52 is installed on the dust exhaust pipes 5121; one end of the main bin 511 is connected with a branch pipe 513, the branch pipe 513 is communicated with the storage bin 11, so that the dust raised in the process of feeding is exhausted; the bottom of the main bin 511 is provided with an arc-shaped cover 514, which covers the screening cylinder 2; the cleaning mechanism 53 includes a cross beam 531 connected to the main bin 511, the cross beam 531 is inserted with a positioning screw 532, the bottom of the positioning screw 532 is connected with a brush plate 534, and the positioning screw 532 is sleeved with a spring 533, and the spring 533 is located between the brush plate 534 and the cross beam 531; through the cooperation of the main bin 511, the top cover 512, the dust exhaust pipes 5121 and the branch pipe 513, the dust removal mechanism 5 can effectively collect and exhaust the dust raised in the screening and conveying process, the centrifugal fan 52 provides powerful air suction to improve the dust removal efficiency; the arc-shaped cover 514 effectively isolates the external environment of the screening cylinder 2 to prevent dust leakage; through the cooperation of the cross beam 531, the positioning screw 532, the brush plate 534 and the spring 533, the cleaning mechanism 53 can realize automatic cleaning of the filter hole on the surface of the screening cylinder 2, prevent the screen hole from being blocked, ensure the screening efficiency and stable operation of the equipment, and improve the automation and environmental protection performance of the equipment.

[0033] Example 2: Referring to Figures 1-9 , the present embodiment mainly aims at the practical application of the above-mentioned feeding equipment with screening function in a high-temperature and high-humidity environment of an injection molding production workshop. The equipment comprehensively considers the requirements of continuous feeding of raw materials, particle size classification, blockage protection, dust control and equipment maintenance and other aspects in structure design and operation principle.

[0034] In actual operation, first of all, the operator will put the bulk injection raw materials evenly into the storage bin 11 of the storage mechanism 1. The lower part of the storage bin 11 is in stable contact with the ground through the symmetrically distributed support legs 111, which can bear a large load and is suitable for continuous large-batch feeding. The inside of the storage bin 11 is structurally reinforced by the first inner support frame 12 and the rotating frame 14. The rotating frame 14 is externally provided with a plurality of shovels 15. The shovels 15 continuously scrape and lift the raw materials in the bin during the rotation of the rotating frame 14. The lifted raw materials are transported forward through the guide piece 13 provided at the top of the first inner support frame 12. The guide piece 13 is made of wear-resistant stainless steel material and can resist friction loss for a long time. The front end of the guide piece 13 extends into the inside of the screening cylinder 2, and the discharge port 131 penetrates the bottom of the guide piece 13 and is provided with a detachable cleaning port, which is convenient for regular maintenance.

[0035] When the raw materials fall into the screening cylinder 2 through the discharge port 131, the screening cylinder 2 is uniformly rotated by 360 degrees under the drive of the first motor 35 through the belt transmission drive shaft 24. The outer wall of the screening cylinder 2 is uniformly distributed with the first filter hole 21 and the second filter hole 22 along the circumference, which are respectively suitable for screening out raw materials of different particle sizes. The second inner support frame 23 is installed in the screening cylinder 2 to provide high-strength support and prevent the screening cylinder 2 from deforming when it is running at high speed. The drive shaft 24 is provided with a drive gear 241 at one end, which is engaged with the support rod 121 and the linkage shaft 122 inside the first inner support frame 12 and the driven gear 1221 to realize reliable transmission of power. One end of the rotating frame 14 is connected to the linkage shaft 122 through the connecting frame 141 to ensure efficient cooperation of the entire power chain.

[0036] During the screening process, the raw material particles are continuously classified under the action of centrifugal force and gravity. The smaller particle size raw materials are preferentially screened into the discharge bin 3 through the first filter hole 21, guided by the dividing plate 33, and discharged through the first discharge port 31; the larger particle size raw materials are screened into the discharge bin 3 through the second filter hole 22 and output through the second discharge port 32. The discharge bin 3 is treated with a corrosion-resistant coating to ensure that it is not corroded by impurities in the raw materials for a long time. The bottom support frame 34 and the shaft seats 341 provided at both ends provide an additional fulcrum for the drive shaft 24, making the screening cylinder 2 run more smoothly and greatly reducing equipment noise and vibration.

[0037] The classified raw materials are continuously transported by the lifting mechanism 4. The first discharge port 31 is connected to the feed pipe 411 through a flange to ensure air tightness, and a wear-resistant sealing ring is provided between the feed pipe 411 and the feed pipe 41 to prevent raw material leakage. The auger 42 inside the feed pipe 41 is designed with multiple spiral blades to effectively prevent bridging and clogging of the raw materials during lifting. The second motor 43 automatically adjusts the speed according to the process requirements to realize synchronization with the production rhythm of the injection molding machine. The discharge end of the discharge pipe 412 is provided with a pneumatic gate, which can be automatically opened and closed according to the real-time signal of the injection molding machine to realize quantitative feeding of the raw materials and avoid waste.

[0038] Dust control is particularly important during screening and conveying. The dust removal bin 51 of the dust removal mechanism 5 is provided with a high-efficiency centrifugal fan 52 at the top, which can automatically adjust the air volume to meet the needs of different working conditions. The top cover 512 and the evenly distributed dust removal pipe 5121 on the top of the main bin 511 ensure that the dust at each screening point is collected. The main bin 511 is connected to the storage bin 11 through the branch pipe 513, which can simultaneously process the dust generated during the feeding and screening processes. The bottom arc cover 514 encloses the environment around the screening cylinder 2, further improving the dust removal efficiency. The cross beam 531, positioning screw 532, brush plate 534 and spring 533 in the cleaning mechanism 53 work together. The brush plate 534 closely adheres to the surface of the cylinder when the screening cylinder 2 rotates, periodically removing blockages and effectively preventing screen clogging. The brush plate 534 is made of high-temperature-resistant composite elastic material, suitable for long-term high-frequency operation.

[0039] The embodiment also supplements an intelligent detection module (such as a photoelectric sensing device) that monitors the remaining amount and flow state of the raw materials in the storage bin 11, screening cylinder 2 and discharge bin 3 in real time, and automatically controls the start and stop of the first motor 35, second motor 43 and centrifugal fan 52 through the PLC system. All operating parameters and equipment states are displayed intuitively on the human-machine interface outside the equipment, allowing operators to monitor and adjust at any time.

[0040] Embodiment 3: Referring to Figures 1-9 This embodiment focuses on structural integration and efficient automated conveying.

[0041] The storage mechanism 1 is of SY-L-200 type, the storage bin 11 is made of food-grade stainless steel (SUS304) with a capacity of 200L, and the bottom of the storage bin 11 is stably supported on the ground by support legs 111; the first inner support frame 12 is made of high-strength aluminum alloy, connected to the rotating frame 14, and the rotating frame 14 is externally provided with a shovel 15 made of nylon material. The shovel 15 cooperates with the automatic rotation of the storage mechanism 1 to realize uniform and continuous conveying of the raw materials to the guide member 13 (POM polyoxymethylene material). One end of the guide member 13 is directly inserted into the screening cylinder 2 (SUS304 material), and the raw materials are smoothly poured through the inclined discharge port 131. The screening cylinder 2, discharge bin 3, lifting mechanism 4 and dust removal mechanism 5 are all connected through flanges and sealing rings. The discharge bin 3 is made of high-strength polypropylene composite board, and the feeding pipe 41 of the lifting mechanism 4 is made of PA66 engineering plastic.

[0042] Under the support of the automated control system, the above components realize integrated automatic linkage, significantly improving the feeding and screening efficiency.

[0043] Traditional manual feeding equipment requires manual feeding of raw materials into the injection molding machine in batches, step-by-step transfer, complex process, high labor intensity, and problems such as raw material scattering. The automation and efficiency are far lower than the embodiment.

[0044] Example 4: Referring to Figure 5 , Figure 6 , This embodiment is directed to multi-stage classification structure and product consistency.

[0045] The model of the screening cylinder 2 is SY-SX-500, the cylinder body is made of thick wall 304 stainless steel, the length is 800 mm, and the inner diameter is 300 mm. Two kinds of filter holes are provided on the surface of the screening cylinder 2 along the circumference, the first filter hole 21 has a diameter of 2 mm, and the second filter hole 22 has a diameter of 5 mm. The screening cylinder 2 is tightly connected with the driving shaft 24 (high-strength alloy steel) through the second inner support frame 23, and is driven to rotate by the first motor 35 (750W variable frequency motor). The raw material rotates with the cylinder body under the action of centrifugal force, and the particles below 2 mm fall into the discharge bin 3 (polyethylene plate) through the first filter hole 21, and the particles below 5 mm enter different discharge ports through the second filter hole 22.

[0046] After the raw materials of different particle sizes are separated, they are sent to the injection molding machine through the lifting mechanism 4 to ensure that the particle size of each batch of feed is uniform and the product quality is consistent.

[0047] The traditional screening equipment adopts single-stage screen, the particle size distribution of the raw material is wide, and the fine particles and coarse particles are easily mixed, the performance of the injection molding product is unstable, and the scrap rate is high.

[0048] Example 5: Referring to Figures 4-7 , this embodiment is directed to discharge separation, stable conveying and equipment life.

[0049] The model of the discharge bin 3 is SY-PL-150, the whole is made of corrosion-resistant composite coated carbon steel, and is provided with a first discharge port 31 (diameter 50 mm), a second discharge port 32 (diameter 80 mm) and a partition plate 33 (wear-resistant ABS material). The partition plate 33 effectively separates the raw materials of different particle sizes and flows to two independent discharge ports. The bottom support frame 34 is made of galvanized steel, and the two ends are provided with a rotating shaft seat 341 (self-lubricating copper bushing) to provide a stable fulcrum for the driving shaft 24.

[0050] The structure of the discharge bin 3 is strengthened, the equipment noise is less than 60 dB during operation, the vibration is less than 2 mm, and the service life is more than five years.

[0051] The conventional discharge bin has no separation structure, all the screened raw materials are mixed, which increases the impurities of the finished product, and the structure is thin, which is easy to deform or resonate during operation, the maintenance cycle is short, and the equipment life is low.

[0052] Example 6: Referring to Figures 8-9 , this embodiment is directed to high-efficiency dust removal and automatic cleaning.

[0053] The dust removal mechanism 5 adopts a dust removal bin 51 of a SY-CC-100 type, and the main bin 511 and the top cover 512 are integrally welded into shape by 304 stainless steel, the top cover 512 is provided with four dust removal pipes 5121 with a diameter of 60 mm in the length direction, and the dust removal pipes 5121 are uniformly connected with a high air volume centrifugal fan 52 (a DF-450 type, a power of 1.1 kW), and branch pipes 513 (polytetrafluoroethylene pipes) are sealingly connected with the storage bin 11. The bottom of the main bin 511 is provided with an arc-shaped cover 514 (formed by stamping a steel plate), and the arc-shaped cover 514 completely covers the screening cylinder 2, so that the dust is prevented from leaking out.

[0054] The cleaning mechanism 53 is composed of a cross beam 531 (aluminum alloy), a positioning screw 532 (high-strength alloy), a brush plate 534 (high-temperature-resistant PPS bristles) and a spring 533 (silicon steel), the brush plate 534 can periodically clean the surface of the screening cylinder 2, and the brush plate 534 prevents the screening cylinder 2 from being blocked.

[0055] The traditional equipment does not have an independent dust removal and cleaning system, the dust overflow is serious during the screening process, the screening holes need to be manually cleaned after being blocked, the production environment is poor, the maintenance amount is large, and the automation and environmental protection performance are poor.

[0056] The working principle of the application is as follows: A feeding equipment with a screening function for an injection molding machine, in actual work, the specific operation steps and principles are as follows: 1. Raw material feeding and preliminary transfer An operator feeds the injection raw material into the storage bin 11. The bottom of the storage bin 11 is supported by support legs 111, and the inside is provided with a first inner support frame 12, and the first inner support frame 12 is rotationally connected with a rotating frame 14. The outer side of the rotating frame 14 is provided with a shovel 15, and the shovel 15 is continuously scooped up and sent to the guide piece 13 under the driving of the rotating frame 14.

[0057] 2. Raw material is introduced into the screening cylinder in a direction The guide piece 13 is inclinedly arranged, one end of the guide piece 13 is inserted into the screening cylinder 2, and the bottom of the guide piece 13 is provided with a discharge port 131. After the raw material is fed into the guide piece 13 by the shovel 15, the raw material falls into the screening cylinder 2, so that the continuous feeding of the raw material is realized.

[0058] 3. Screening cylinder driving and screening process The outer shell of the screening cylinder 2 is uniformly provided with first filter holes 21 and second filter holes 22, and the inside is provided with a second inner support frame 23, and the second inner support frame 23 is provided with a driving shaft 24. One end of the driving shaft 24 is provided with a driving gear 241, and the driving shaft 24 is connected and driven by a belt and a first motor 35, so that the screening cylinder 2 is driven to rotate.

[0059] Meanwhile, the first inner support frame 12 is internally provided with a support rod 121, and a linkage shaft 122 is rotationally connected to the center of the support rod 121. The linkage shaft 122 is provided with a driven gear 1221 at one end, and the driven gear 1221 is engaged with the driving gear 241. The other end of the linkage shaft 122 is connected with the connecting frame 141 on the rotating frame 14, so as to realize synchronous rotation.

[0060] The raw materials are rotated in the screening cylinder 2, and the particle classification screening is completed by the first filtering hole 21 and the second filtering hole 22 under the action of centrifugal force and gravity.

[0061] 4. Raw material collection and grading discharge The smaller particle raw materials screened through the first filtering hole 21 fall into the discharge bin 3, are shunted by the partition plate 33, and are discharged through the first discharge port 31. The larger particle raw materials screened through the second filtering hole 22 also fall into the discharge bin 3 and are discharged through the second discharge port 32. The partition plate 33 is arranged between the first discharge port 31 and the second discharge port 32, so as to prevent material mixing.

[0062] 5. Raw material lifting to the feeding port of the injection molding machine The first discharge port 31 is connected with a feeding pipe 411, and the feeding pipe 411 is connected with a feeding pipe 41. The feeding pipe 41 is internally provided with an auger 42, and the auger 42 is driven to rotate by a second motor 43. The auger 42 can lift the raw materials to a discharge pipe 412 at the other end of the feeding pipe 41. The discharge pipe 412 is directly connected with the feeding port of the injection molding machine, so as to realize automatic conveying of the screened raw materials.

[0063] 6. Dust removal and cleaning during the screening process A dust removal bin 51 is arranged above the screening cylinder 2, and a centrifugal fan 52 is mounted at the top of the dust removal bin 51. The dust removal bin 51 is internally provided with a main bin 511, a top cover 512, a branch pipe 513 (communicating with the storage bin 11), and an arc-shaped cover 514 (covering the screening cylinder 2), so as to further improve the dust removal efficiency.

[0064] Meanwhile, positioning screws 532 are inserted on the cross beams 531 in the dust removal bin 51, the bottom of the positioning screws 532 is connected with brush plates 534, and the brush plates 534 are sleeved with springs 533. The cleaning mechanism 53 can brush off the residues on the filtering holes during the rotation of the screening cylinder 2, so as to avoid the blockage of the hole diameters and ensure the screening efficiency and stable operation of the equipment.

[0065] The above only describes the preferred embodiments of the present application. It should be noted that, for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application. The structures, devices and operation methods not specifically described and explained in the present application are implemented according to the conventional means in the art, unless otherwise specified and limited.

Claims

1. A feeding device with screening function for injection molding machine, characterized in that: a storage mechanism (1) for feeding injection molding raw materials is arranged, one side of the storage mechanism (1) is provided with a screening cylinder (2), the screening cylinder (2) is used for screening the raw materials; a discharge bin (3) is arranged at the bottom of the screening cylinder (2), the discharge bin (3) is used for receiving the raw materials after screening; one side of the discharge bin (3) is provided with a lifting mechanism (4), the lifting mechanism (4) delivers the raw materials after screening to the feeding port of the injection molding machine, so that the injection molding machine can perform injection molding operation; a dust removal mechanism (5) is arranged above the screening cylinder (2), the dust removal mechanism (5) is used for timely discharging the dust generated in the screening process. The storage mechanism (1) comprises a storage bin (11), the shape of the storage bin (11) is arranged as a horizontally placed circular truncated cone with two open ends, and the bottom of the storage bin (11) is symmetrically provided with supporting legs (111); a first inner support frame (12) is connected inside the storage bin (11), a rotating frame (14) is rotatably connected to the first inner support frame (12); a guide piece (13) is arranged at the top of the first inner support frame (12), one end of the guide piece (13) extends into the screening cylinder (2); a shovel (15) is arranged on the outer side of the rotating frame (14); the shovel (15) delivers the raw materials in the storage bin (11) to the guide piece (13), and delivers the raw materials to the screening cylinder (2) through the guide piece (13). The guide piece (13) is arranged obliquely, and a discharge port (131) is formed at the bottom of one end of the guide piece (13). First filter holes (21) and second filter holes (22) are uniformly formed through the screening cylinder (2). A second inner support frame (23) is connected inside the screening cylinder (2), a drive shaft (24) is connected to the second inner support frame (23), and a drive gear (241) is sleeved at one end of the drive shaft (24); a support rod (121) is arranged inside the first inner support frame (12), a linkage shaft (122) is rotatably connected at the center of the support rod (121), a driven gear (1221) is sleeved at one end of the linkage shaft (122), and the driven gear (1221) is engaged with the drive gear (241); one end of the rotating frame (14) is connected with a connecting frame (141), and the other end of the linkage shaft (122) is connected with the connecting frame (141); a first motor (35) is arranged at one end of the discharge bin (3), and a belt is arranged between the first motor (35) and the drive shaft (24).

2. The feeding equipment with screening function for injection molding machine according to claim 1, characterized in that: A first discharge port (31) is arranged on the side of the discharge bin (3), and a second discharge port (32) is arranged at the bottom of the discharge bin (3); a partition plate (33) is arranged inside the discharge bin (3), and the partition plate (33) is located between the first discharge port (31) and the second discharge port (32); the raw materials screened through the first filter holes (21) fall into the discharge bin (3) and are discharged through the first discharge port (31), and the raw materials screened through the second filter holes (22) fall into the discharge bin (3) and are discharged through the second discharge port (32). ​ ​ ​ ​ 3. The feeding device with screening function for injection molding machine according to claim 2, characterized in that: ​ 4. The feeding device with screening function for injection molding machine according to claim 1, characterized in that: ​ 5. The feeding device with screening function for injection molding machine according to claim 3, characterized in that: ​ ​ ​ ​ 6. The feeding device with screening function for injection molding machine according to claim 1, characterized in that: ​ ​ ​ The second filter hole (22) has a diameter larger than that of the first filter hole (21).

7. The feeding device with screening function for injection molding machine according to claim 6, characterized in that: The bottom of the discharge bin (3) is provided with a support frame (34), both ends of the top of the support frame (34) are provided with a rotating shaft seat (341), and the driving shaft (24) is installed on the rotating shaft seat (341).

8. The feeding device with screening function for an injection molding machine according to claim 6, characterized in that: The lifting mechanism (4) comprises a feeding pipe (41), and the upper end of one end of the feeding pipe (41) is provided with a feeding pipe (411) connected with the first discharge port (31). The other end of the feeding pipe (41) is provided with a discharge pipe (412) connected with the feeding port of the injection molding machine.

9. The material loading device with a screening function for an injection molding machine according to claim 8, characterized in that: The inside of the feeding pipe (41) is provided with an auger (42), and the other end of the feeding pipe (41) is provided with a second motor (43) for driving the auger (42) to rotate.

10. The feeding device with screening function for injection molding machine according to claim 1, characterized in that: The dust removal mechanism (5) comprises a dust removal bin (51), the top of the dust removal bin (51) is provided with a centrifugal fan (52) for guiding flow, and the inside of the dust removal bin (51) is provided with a cleaning mechanism (53) for cleaning the rotating screening cylinder (2) to avoid the blocking of the filter hole by the particles of the raw material. The dust removal bin (51) comprises a main bin (511) in the shape of a cavity with open ends, and the top of the main bin (511) is provided with a top cover (512), and the top cover (512) is provided with dust exhaust pipes (5121) at equal intervals along the length direction thereof, and the centrifugal fan (52) is installed on the dust exhaust pipes (5121). One end of the main bin (511) is connected with a branch pipe (513) in communication with the storage bin (11); so that the dust raised in the process of feeding is discharged; The bottom of the main bin (511) is provided with an arc-shaped cover (514) covering the screening cylinder (2); The cleaning mechanism (53) comprises a cross beam (531) connected to the main bin (511), the cross beam (531) is inserted with a positioning screw (532), the bottom of the positioning screw (532) is connected with a brush plate (534), and the positioning screw (532) is sleeved with a spring (533), and the spring (533) is located between the brush plate (534) and the cross beam (531).

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