Centralized feeding system for granular materials

Abstract

The present invention discloses a centralized feeding system for particulate materials. A material tank is connected to an injection molding machine through a centralized material receiving device. The centralized material receiving device is provided with a plurality of centralized receiving pipes. The top of each centralized receiving pipe and along the axial direction of the centralized receiving pipe are provided with a plurality of receiving ports. The discharge pipe provided at the bottom of the material tank is connected to the material feeding port of the material distribution tank. The material distribution tank is connected with a plurality of material distribution discharge pipes. The material distribution discharge pipes are respectively connected to the corresponding material receiving ports of the centralized receiving pipe through a material conveying pipe A. The centralized receiving pipe is connected to the hopper of the corresponding injection molding machine through a material conveying pipe B. It can be seen from the above structure that in the centralized feeding system for particulate materials of the present invention, the material drawn from the material tank can completely enter the hopper of the corresponding injection molding machine, the feeding accuracy of each material can be ensured, and the feeding efficiency of the material can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of centralized feeding of granular materials, and in particular to a centralized feeding system for granular materials. Background Art

[0002] Injection molding machine is also called injection molding machine or injection machine. It is the main molding equipment that uses plastic molding molds to make plastic products of various shapes from thermoplastics or thermosetting plastics. It is divided into vertical, horizontal and all-electric types. The injection molding machine can heat the plastic and apply high pressure to the molten plastic to make it ejected and fill the mold cavity.

[0003] The injection molding machine sucks various granular materials into the hopper of the injection molding machine and mixes them before injection molding. Since different injection molding machines of manufacturing companies produce different products, different products have different material ratios. If the ratio is done manually, not only is the efficiency extremely low, but the accuracy of the material ratio cannot be guaranteed. Therefore, a centralized feeding system is needed to feed all the material tanks to each injection molding machine through the centralized feeding system.

[0004] However, the applicant has discovered that the current centralized feeding system generally uses the negative pressure generated by the exhaust fan to transfer the material in the material tank to the hopper of the injection molding machine. The negative pressure force is constant and the material extraction speed from the material tank is constant, so the material delivery amount can be determined by time. However, the material feeding based on this principle needs to ensure that the material extracted from the material tank completely enters the hopper of the injection molding machine. However, during use, the current material feeding system may have material remaining in the conveying pipeline; and in the technical solution similar to the publication number CN209209528U, since the same material tank needs to feed multiple devices, it is also possible that the material that should have been delivered to a certain device is delivered to another device due to the material remaining in the conveying pipeline, resulting in the material ratios of multiple devices not meeting the requirements. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a centralized feeding system for granular materials, so that the materials extracted from the material tank can completely enter the hopper of the corresponding injection molding machine, the feeding accuracy of each material can be guaranteed, and the feeding efficiency of the materials can be improved; the vertical pipe drives the horizontal pipe to rotate, so that when the materials need to be fed to different injection molding machines at different times, the horizontal pipe can be automatically rotated to the corresponding material distribution and discharge pipe in time under the action of the wind force generated by the exhaust fan when exhausting air, so that the materials blown out of the horizontal pipe can directly enter the centralized material receiving pipe connected to the injection molding machine through the corresponding material distribution and discharge pipe; and the materials are prevented from remaining in the material distribution tank and entering the injection molding machine. The material in the hopper is damaged, which leads to the material ratio in the injection molding machine hopper not being consistent with the process requirements, thus affecting the product quality; through the action of the vertical piece A and the vertical piece B, the principle of the wind direction meter is utilized, thereby further improving the effect of the exhaust fan wind force on the rotation of the vertical pipe and the horizontal pipe, ensuring that the horizontal pipe can correspond to the corresponding material distribution and discharge pipe, thereby ensuring the accuracy of material supply; through the action of the pipe layout, the pipe layout can enter the material distribution and discharge pipe, ensuring that the material in the horizontal pipe can directly enter the material distribution and discharge pipe, while also facilitating the rotation of the horizontal pipe and the vertical pipe. In addition, because the pipe layout is flexible, compared with the rigid transmission pipe, the friction with the material is relatively large, and it can also It has a certain deceleration effect on the material discharge speed, reducing the impact force of the material on the conveying pipeline; through the setting of the elbow, the material discharged from the horizontal pipe forms a buffer transition, avoiding the material being under the action of wind all the time and causing too fast speed to produce a large impact force on the conveying pipeline, thereby shortening the use of the conveying pipeline; through the action of the oblique support rod, the pipe mouth of the pipe is opened and can be relatively fixed, so as to ensure the discharge direction of the pipe, avoid the pipe mouth of the pipe swinging back and forth, which may cause the material to be thrown out of the distribution discharge pipe, and ensure that the material completely enters the distribution discharge pipe; it can also prevent the material from being excessively affected by the pipe and causing the material discharge speed to be too low, thereby causing the material The annular connection notch facilitates the positioning of the annular sealing clamp and the connection of the elbow pipe mouth; the connecting convex ring and the connecting annular connection groove further ensure the coaxiality of the elbow pipe and the distribution discharge pipe, and prevent the accumulation of materials at the elbow and the distribution discharge pipe; the conical arc surface structure of the bottom edge of the distribution tank, and the matching of the distribution discharge pipe and the cross pipe with the conical arc surface, facilitate the material in the vertical pipe to enter the cross pipe, and facilitate the material in the cross pipe to enter the distribution discharge pipe, and can also make the material escaping from the pipe mouth of the distribution discharge pipe on one side of the distribution tank flow back to the distribution discharge pipe as much as possible, to ensure that the material drawn out from the material tank completely enters the injection molding machine.

[0006] The technical solution adopted by the invention is:

[0007] A centralized feeding system for granular materials comprises a plurality of material tanks and a plurality of injection molding machines, wherein the material tanks are connected to the injection molding machines through a centralized material receiving device, wherein the centralized material receiving device is provided with a plurality of centralized receiving pipes, wherein a plurality of receiving ports are provided at the top of each centralized receiving pipe and along the axial direction of the centralized receiving pipe, wherein the number of the centralized receiving pipes is greater than or equal to the number of the injection molding machines, wherein the number of receiving ports of each centralized receiving pipe is greater than or equal to the number of the material tanks, wherein the discharge pipe provided at the bottom of the material tank is connected to the material feeding port of the material distributing tank, wherein the material distributing tank is connected to a plurality of material distributing discharge pipes, wherein the number of the material distributing discharge pipes matches the number of the centralized receiving pipes, and wherein the material distributing discharge pipes are respectively connected to the material distributing discharge pipes through the bottom of the material tank. The material conveying pipe A is respectively connected with the corresponding receiving ports of the centralized material receiving pipe, and the centralized material receiving pipe is connected with the corresponding hopper of the injection molding machine through the material conveying pipe B; the discharge pipe is also provided with a bypass pipe connected with the outside atmosphere, and the discharge pipe is respectively connected with the bypass pipe and the material tank through a three-way joint, and the three-way joint is respectively provided with valves of the bypass pipe and the material tank; the exhaust fan provided in the injection molding machine extracts the material and air from the material tank through the discharge pipe into the distribution tank, and then the distribution discharge pipe of the distribution tank enters the centralized material receiving pipe from the receiving port through the material conveying pipe A, and finally enters the hopper of the injection molding machine through the material conveying pipe B, and finally the air is discharged through the exhaust fan.

[0008] A further improvement scheme of the present invention is that the material distribution discharge pipes are evenly distributed at the bottom of the side wall of the material distribution tank, and the material distribution discharge pipes are connected with the inside of the material distribution tank, and a vertical pipe is connected at the axis center of the material distribution tank to rotate around the axis center of the material distribution tank, and the top of the vertical pipe is connected with the discharge pipe through a feed connecting pipe, the bottom end of the vertical pipe is sealed, and the bottom of the side wall of the vertical pipe is connected with a horizontal pipe, and one end of the horizontal pipe away from the vertical pipe extends to the side wall of the material distribution tank; when the horizontal pipe corresponds to the material distribution discharge pipe under the action of the vertical pipe, the horizontal pipe is coaxial with the corresponding material distribution discharge pipe, and the inner diameter of the material distribution discharge pipe matches the outer diameter of the horizontal pipe.

[0009] A further improvement of the present invention is that the feed connecting pipe is fixedly connected to the top of the material distribution tank, and the feed connecting pipe penetrates downward through the top of the material distribution tank.

[0010] A further improvement of the present invention is that the bottom of the feed connecting pipe is connected to a coaxially arranged rotating sleeve, the top of the vertical pipe is coaxially sealed and fixedly connected to the rotating sleeve, and the bottom end of the vertical pipe is rotatably connected to the bottom axis of the distribution tank through a bearing.

[0011] A further improvement of the present invention is that a side wall of the vertical pipe, corresponding to a side of the horizontal pipe, is provided with a vertical piece B, and a side wall of the vertical pipe, facing away from the horizontal pipe, is provided with a vertical piece A, the axes of the vertical piece A, vertical piece B and the horizontal pipe are located in the same vertical plane passing through the axis of the vertical pipe, and the vertical piece A extends away from the edge of the vertical pipe to the inner wall of the distribution tank, and the vertical piece A and the vertical piece B form a guide air piece of the horizontal pipe.

[0012] A further improvement of the present invention is that the material distribution discharge pipe is inclined downward in a direction away from the axis of the material distribution tank, and a conical arc surface is provided at the edge of the bottom of the material distribution tank, and the conical arc surface is flush with the bottom of the inner wall of the material distribution discharge pipe, and the conical arc surface is in contact with the bottom of the horizontal tube.

[0013] A further improvement of the present invention is that a cloth pipe is sleeved on one end of the transverse tube away from the vertical tube, and the outer diameter of the cloth pipe matches the transverse tube. When the transverse tube and the corresponding distribution and discharge pipe are coaxially corresponding and the airflow enters the distribution and discharge pipe from the transverse tube, the cloth pipe extends into the distribution and discharge pipe.

[0014] A further improvement of the present invention is that one end of the distribution discharge pipe away from the distribution tank is connected to the material conveying pipe A through a bent pipe, and the bent pipe is connected to the distribution discharge pipe, bends upward and then bends downward to form an "S" elbow, and corresponding annular connecting notches are respectively provided at both ends of the outer wall of the bent pipe and the end of the outer wall of the distribution discharge pipe facing the bent pipe, and the distribution discharge pipe and the bent pipe are fixedly connected by an annular sealing clamp.

[0015] A further improvement of the present invention is that an annular connecting groove is provided at one end of the inner side wall of the material distribution and discharge pipe facing the bent pipe, and a connecting convex ring matching and connected to the annular connecting groove is provided at one end of the bent pipe connected to the material distribution and discharge pipe.

[0016] A further improvement of the present invention is that a plurality of oblique support rods are evenly provided on the inner wall of the connecting convex ring, and the oblique support rods extend toward the distribution discharge pipes respectively and are inclined toward the axis of the distribution discharge pipes along the direction pointing to the distribution discharge pipes, and one end of the oblique support rods extending out of the bent pipes are fixedly connected to each other at the axis of the distribution discharge pipes, and when the bent pipes are fixed to the distribution discharge pipes and when the cloth pipes are extended into the corresponding distribution discharge pipes, one end of the oblique support rods extending out of the bent pipes extends into the pipe opening of the cloth pipes away from one end of the horizontal pipes.

[0017] A further improvement of the present invention is that the centralized material receiving pipes are fixedly connected to the centralized material receiving device in side by side, the corresponding material receiving ports of each centralized material receiving pipe are respectively arranged in the same row, and the corresponding material receiving ports in the same row are fixedly connected to the centralized material receiving device through connecting cross bars, and the tube bodies of the centralized material receiving pipes are fixedly connected to the centralized material receiving device through connecting longitudinal bars.

[0018] A further improvement of the present invention is that when the number of centralized material receiving pipes is greater than the number of injection molding machines, the discharge pipe openings and receiving openings of the centralized material receiving pipes not connected to the injection molding machines are respectively installed with covers.

[0019] A further improvement of the present invention is that when the number of the receiving ports of the centralized receiving pipe is greater than the number of the material tanks, the receiving ports that are not connected to the material discharging pipes are respectively equipped with covers.

[0020] The beneficial effects of the present invention are:

[0021] First, the centralized particulate material feeding system of the present invention can completely allow the materials drawn from the material tank to enter the hopper of the corresponding injection molding machine, thereby ensuring the feeding accuracy of each material and improving the feeding efficiency of the material.

[0022] Secondly, the centralized feeding system for particulate materials of the present invention drives the horizontal tube to rotate through the vertical tube, so that when different injection molding machines need to feed the material at different times, the horizontal tube can be automatically and timely rotated to the corresponding material distribution and discharge pipe under the action of the wind force generated by the exhaust fan when exhausting air, so that the material blown out of the horizontal tube directly enters the centralized receiving pipe connected to the injection molding machine through the corresponding material distribution and discharge pipe; it avoids the material remaining in the distribution tank and causing the material to be damaged in the hopper of the injection molding machine, and then causing the material ratio in the hopper of the injection molding machine to be inconsistent with the process requirements and affect the product quality.

[0023] Third, the centralized feeding system for particulate materials of the present invention utilizes the principle of a wind direction meter through the functions of the vertical pieces A and B, thereby further improving the rotational effect of the exhaust fan wind on the vertical pipes and the horizontal pipes, ensuring that the horizontal pipes can correspond to the corresponding material distribution and discharge pipes, thereby ensuring the accuracy of material supply.

[0024] Fourthly, the centralized feeding system for particulate materials of the present invention can enter the distribution and discharge pipes through the function of pipe layout, thereby ensuring that the materials in the horizontal pipes can directly enter the distribution and discharge pipes, while facilitating the rotation of the horizontal pipes and the vertical pipes. In addition, since the pipe layout is flexible, compared with the rigid conveying pipes, the friction force with the materials is relatively large, and it can also have a certain deceleration effect on the discharge speed of the materials, thereby reducing the impact force of the materials on the conveying pipes.

[0025] Fifth, the centralized feeding system for particulate materials of the present invention forms a buffer transition for the materials discharged from the horizontal pipe by setting the curved pipe, so as to prevent the materials from being constantly under the action of wind and causing excessive speed to produce a large impact force on the conveying pipeline, thereby shortening the service life of the conveying pipeline.

[0026] Sixth, the centralized feeding system for particulate materials of the present invention, through the action of the diagonal support rod, makes the pipe opening of the distribution pipe open and can make the pipe opening of the distribution pipe relatively fixed, so as to ensure the discharge direction of the distribution pipe, avoid the pipe opening of the distribution pipe swinging back and forth, which may cause the material to be thrown out of the distribution discharge pipe, and ensure that the material completely enters the distribution discharge pipe; it can also prevent the material from being excessively affected by the distribution pipe, causing the material discharge speed to be too low, thereby causing the material to accumulate.

[0027] Seventh, the centralized particulate material feeding system of the present invention facilitates the positioning of the annular sealing hoop and the connection of the elbow pipe opening through the function of the annular connecting notch.

[0028] Eighth, the centralized feeding system for particulate materials of the present invention, the functions of the connecting convex ring and the connecting annular connecting groove further ensure the coaxiality of the elbow and the material distribution and discharge pipe, and prevent the accumulation of materials at the elbow and the material distribution and discharge pipe.

[0029] Ninth, the centralized feeding system for particulate materials of the present invention, through the conical arc surface structure of the bottom edge of the distribution tank, and the matching of the distribution discharge pipe and the cross pipe with the conical arc surface, makes it convenient for all the materials in the vertical pipe to enter the cross pipe, and for the materials in the cross pipe to enter the distribution discharge pipe. It can also make the materials escaping from the pipe opening on one side of the distribution discharge pipe in the distribution tank flow back into the distribution discharge pipe as much as possible, thereby ensuring that the materials drawn out of the material tank completely enter the injection molding machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a top view schematic diagram of the present invention.

[0031] Figure 2 It is an enlarged schematic diagram of the front cross-section of the material dividing device of the present invention. DETAILED DESCRIPTION

[0032] Combination Figure 1~Figure 2It can be seen that the centralized feeding system of particulate materials of the present invention includes multiple material tanks 1 and multiple injection molding machines 4, the material tanks 1 are connected to the injection molding machines 4 through the centralized material receiving device 3, the centralized material receiving device 3 is provided with multiple centralized receiving pipes 8, the top of each centralized receiving pipe 8 and multiple receiving ports 9 are provided along the axial direction of the centralized receiving pipe 8, the number of the centralized receiving pipes 8 is greater than or equal to the number of injection molding machines 4, the number of receiving ports 9 of each centralized receiving pipe 8 is greater than or equal to the number of material tanks 1, the discharge pipe 5 provided at the bottom of the material tank 1 is connected to the material feeding port of the material distribution tank 2, the material distribution tank 2 is connected with multiple material distribution discharge pipes 6, the number of the material distribution discharge pipes 6 matches the number of the centralized receiving pipes 8, and the material distribution discharge pipes 6 are respectively The material conveying pipe A7 is respectively connected with the corresponding receiving port 9 of the centralized receiving pipe 8, and the centralized receiving pipe 8 is connected with the corresponding hopper of the injection molding machine 4 through the material conveying pipe B10; the discharge pipe 5 is also provided with a bypass pipe connected with the outside atmosphere, and the discharge pipe 5 is respectively connected with the bypass pipe and the material tank 1 through a three-way joint, and the three-way joint is respectively provided with valves of the bypass pipe and the material tank 1; the exhaust fan provided in the injection molding machine 4 extracts the material and air from the material tank 1 through the discharge pipe 5 into the distribution tank 2, and then the distribution discharge pipe 6 of the distribution tank 2 enters the centralized receiving pipe 8 from the receiving port 9 through the material conveying pipe A7, and finally enters the hopper of the injection molding machine 4 through the material conveying pipe B10, and finally the air is discharged through the exhaust fan; the distribution The material discharge pipe 6 is evenly distributed at the bottom of the side wall of the material distribution tank 2, and the material distribution discharge pipe 6 is connected to the material distribution tank 2. The axis of the material distribution tank 2 is connected to a vertical pipe 14 that rotates around the axis of the material distribution tank 2. The top of the vertical pipe 14 is connected to the discharge pipe 5 through a feed connecting pipe 19. The bottom end of the vertical pipe 14 is sealed, and the bottom of the side wall of the vertical pipe 14 is connected to a horizontal pipe 15. The end of the horizontal pipe 15 away from the vertical pipe 14 extends to the side wall of the material distribution tank 2; when the horizontal pipe 15 corresponds to the material distribution discharge pipe 6 under the action of the vertical pipe 14, the horizontal pipe 15 is coaxial with the corresponding material distribution discharge pipe 6, and the inner diameter of the material distribution discharge pipe 6 matches the outer diameter of the horizontal pipe 15; the feed connecting pipe 19 is fixedly connected to the top of the material distribution tank 2, and the feed connecting The connecting pipe 19 passes through the top of the material distribution tank 2 downward; the bottom of the feed connecting pipe 19 is connected to a coaxially arranged rotating sleeve 20, the top of the vertical pipe 14 is coaxially sealed and fixedly connected to the rotating sleeve 20, and the bottom end of the vertical pipe 14 is rotatably connected to the axis of the tank bottom 12 of the material distribution tank 2 through a bearing 21; the side wall of the vertical pipe 14, corresponding to the side of the transverse pipe 15, is provided with a vertical piece B27, and the side wall of the vertical pipe 14, facing away from the transverse pipe 15, is provided with a vertical piece A25, the axis of the vertical piece A25, the vertical piece B27 and the transverse pipe 15 are located in the same vertical plane passing through the axis of the vertical pipe 14, and the vertical piece A25 extends away from the edge of the vertical pipe 14 to the inner wall of the material distribution tank 2, and the vertical piece A25 and the vertical piece B27 form a guide wind piece of the transverse pipe 15;The material distribution discharge pipe 6 is inclined downward in a direction away from the axis of the material distribution tank 2, and a conical arc surface 13 is provided at the edge of the tank bottom 12 of the material distribution tank 2, and the conical arc surface 13 is flush with the bottom of the inner wall of the material distribution discharge pipe 6, and the conical arc surface 13 is in contact with the bottom of the cross pipe 15; the end of the cross pipe 15 away from the vertical pipe 14 is sleeved with a pipe 16, and the outer diameter of the pipe 16 matches the cross pipe 15. When the cross pipe 15 corresponds to the corresponding material distribution discharge pipe 6 coaxially, and the airflow enters the material distribution discharge pipe 6 from the cross pipe 15, the pipe 16 extends into the material distribution discharge pipe 6; the end of the material distribution discharge pipe 6 away from the material distribution tank 2 is connected to the material conveying pipe A through a bend pipe 17. 7 is connected, the elbow 17 is connected to the material distribution discharge pipe 6, bends upward and then bends downward to form an "S" elbow, and the two ends of the outer wall of the elbow 17 and the end of the outer wall of the material distribution discharge pipe 6 facing the elbow 17 are respectively provided with corresponding annular connecting notches 23, and the material distribution discharge pipe 6 and the elbow 17 are fixedly connected by an annular sealing clamp 18; the end of the inner wall of the material distribution discharge pipe 6 facing the elbow 17 is provided with an annular connecting groove, and the end of the elbow 17 connected to the material distribution discharge pipe 6 is provided with a connecting convex ring 22 matched with the annular connecting groove; the inner wall of the connecting convex ring 22 is evenly provided with a plurality of oblique support rods 24, and the oblique support rods 24 are respectively provided to the material distribution discharge pipe 6 The material pipe 6 extends and tilts toward the axis of the material discharging pipe 6 in the direction pointing to the material discharging pipe 6. The end of the diagonal support rod 24 extending out of the bent pipe 17 is fixedly connected to the axis of the material discharging pipe 6, and when the bent pipe 17 is fixed to the material discharging pipe 6 and when the cloth pipe 16 is extended into the corresponding material discharging pipe 6, the end of the diagonal support rod 24 extending out of the bent pipe 17 is extended into the pipe opening of the cloth pipe 16 away from the end of the cross pipe 15; the centralized material receiving pipes 8 are fixedly connected to the centralized material receiving device 3 side by side, and the corresponding material receiving ports 9 of each centralized material receiving pipe 8 are respectively arranged in the same row, and the corresponding material receiving ports 9 in the same row are fixed to the centralized material receiving device 3 through the connecting cross bar 11. The centralized material receiving pipe 8 is connected, and the pipe body of the centralized material receiving pipe 8 is fixedly connected to the centralized material receiving device 3 through a connecting longitudinal rod; when the number of centralized material receiving pipes 8 is greater than the number of injection molding machines 4, the discharge pipe openings and the receiving openings 9 of the centralized material receiving pipes 8 not connected to the injection molding machines 4 are respectively installed with covers; when the number of receiving openings 9 of the centralized material receiving pipes 8 is greater than the number of material tanks 1, the receiving openings 9 not connected to the material distributing and discharging pipes 6 are respectively installed with covers; the discharging pipe 5 is connected to the bottom of the material tank 1, and the top of the material tank 1 is provided with a vent hole connected to the outside atmosphere; the centralized material receiving device 3 refers to the "raw material branching station" structure in the technical solution with the publication number CN209209528U. ;

[0033] When the present invention is used, when one of the injection molding machines 4 needs multiple materials for injection molding, the materials needed by the injection molding machine 4 are supplied in sequence.

[0034] When the injection molding machine 4 needs to feed one of the materials, the material tank 1 corresponding to the material first keeps the valve connected to the discharge pipe 5 closed, and opens the valve connected to the discharge pipe 5 and the bypass pipe; then the exhaust fan corresponding to the hopper of the injection molding machine 4 is started, and the outside air enters the discharge pipe 5 through the bypass pipe, and enters the vertical pipe 14 in the corresponding distribution tank 2 through the discharge pipe 5, and enters the distribution discharge pipe 6 connected to the injection molding machine 4 through the horizontal pipe 15 in the distribution tank 2, and then the airflow enters the material conveying pipe A7 through the corresponding elbow 17 of the distribution discharge pipe 6, and the airflow enters the centralized receiving pipe 8 connected to the injection molding machine 4 from the corresponding receiving port 9 through the corresponding material conveying pipe A7, and is conveyed to the exhaust fan corresponding to the hopper of the injection molding machine 4 through the material conveying pipe B10, and finally the air is extracted through the exhaust fan.

[0035] When the transverse tube 15 in the dividing tank 2 does not correspond to the corresponding dividing discharge pipe 6, the airflow blown out by the transverse tube 15 will be blown into the dividing discharge pipe 6 corresponding to the started injection molding machine through the dividing tank 2; due to the flow of airflow in the dividing tank 2, the vertical piece A25 and the vertical plate B27 fixed to the vertical pipe 14 are affected by the airflow, driving the vertical pipe 11 and the transverse tube 15 fixed to the vertical pipe 11 to rotate toward the corresponding dividing discharge pipe 6. When the vertical pipe 11 rotates until the transverse tube 15 corresponds to the dividing discharge pipe 6 connected to the injection molding machine 4 with the exhaust fan started, all the air in the transverse tube 15 directly enters the dividing discharge pipe 6, the vertical pipe 11 stops rotating, and the pipe opening of the pipe 16 away from the end of the transverse tube 15 is propped open by the diagonal support rod 24 under the action of the flowing air.

[0036] Continue for a period of time to ensure that the horizontal pipe 15 connected to the material tank 2 corresponds to the corresponding material distribution discharge pipe 6, and the distribution pipe 16 enters the corresponding material distribution discharge pipe 6; then open the valve connecting the discharge pipe 5 with the corresponding material tank 1, and close the valve connecting the discharge pipe 5 with the corresponding bypass pipe; at this time, under the negative pressure of the exhaust fan, the materials in the corresponding material tank 1 are sucked into the discharge pipe 5 respectively, and then enter the corresponding vertical pipe 14, horizontal pipe 15, and distribution pipe 16 in turn through the discharge pipes 5, and then the materials leave the corresponding distribution pipe 16 and enter the corresponding elbow 17 between the diagonal support rods 24, and then enter the corresponding material conveying pipe A7 connected to the corresponding elbow 17, and enter the corresponding centralized receiving pipe 8 through the receiving port 9 connected to the material conveying pipe A7, and finally convey the materials to the hopper of the injection molding machine 4 through the material conveying pipe B10 connected to the centralized receiving pipe 8;

[0037] The material feeding amount is converted through the delayed timing. When the material tank 2 of the material is continuously extracted for a period of time, the material amount extracted from the material tank 2 of the material reaches the material amount of the injection molding machine 4 for the material; at this time, the valve connecting the discharge pipe 5 of the material tank 2 with the corresponding material tank 1 is closed again, and at the same time, the valve connecting the discharge pipe 5 of the material tank 2 with the corresponding bypass pipe is opened again; and it is maintained for a period of time again, so that all the materials extracted from the material tank 2 and not yet entered the hopper of the injection molding machine 4 enter the hopper of the injection molding machine 4.

[0038] After the material completely enters the hopper of the injection molding machine 4, close the valve connecting the discharge pipe 5 of the material tank 2 of the material and the corresponding bypass pipe; and repeat the above process so that the material tank 1 corresponding to another material required by the injection molding machine 4 can also supply the injection molding machine 4.

[0039] When multiple injection molding machines 4 need to perform injection molding at the same time, different material tanks 2 are controlled by a program to supply materials to different injection molding machines 4 at the same time, so as to ensure the accuracy of the feeding of each material and improve the efficiency of the feeding of each material as much as possible.

Claims

1. The centralized feeding system for particulate materials is characterized by: The invention comprises a plurality of material tanks (1) and a plurality of injection molding machines (4), wherein the material tanks (1) are connected to the injection molding machines (4) through a material centralized material receiving device (3), wherein the material centralized material receiving device (3) is provided with a plurality of centralized material receiving pipes (8), wherein a plurality of material receiving ports (9) are provided at the top of each centralized material receiving pipe (8) and along the axial direction of the centralized material receiving pipe (8), wherein the number of the centralized material receiving pipes (8) is greater than or equal to the number of the injection molding machines (4), and the number of the material receiving ports (9) of each centralized material receiving pipe (8) is greater than or equal to the number of the material tanks (1), wherein a discharge pipe (5) provided at the bottom of the material tank (1) is connected to a material distribution feed port of a material distribution tank (2), wherein the material distribution tank (2) is connected to a plurality of material distribution discharge pipes (6), wherein the number of the material distribution discharge pipes (6) matches the number of the centralized material receiving pipes (8), and wherein the material distribution discharge pipes (6) are respectively connected to the material distribution feed port of the material distribution tank (2) and the material distribution feed port of the material distribution tank (2). The delivery pipe A (7) is respectively connected to the corresponding receiving port (9) of the centralized receiving pipe (8), and the centralized receiving pipe (8) is connected to the corresponding hopper of the injection molding machine (4) through the material conveying pipe B (10); the discharge pipe (5) is also provided with a bypass pipe connected to the outside atmosphere, and the discharge pipe (5) is respectively connected to the bypass pipe and the material tank (1) through a three-way joint, and the three-way joint is respectively provided with valves of the bypass pipe and the material tank (1); the exhaust fan provided in the injection molding machine (4) extracts the material and air from the material tank (1) through the discharge pipe (5) into the distribution tank (2), and then the distribution discharge pipe (6) of the distribution tank (2) enters the centralized receiving pipe (8) from the receiving port (9) through the material conveying pipe A (7), and finally enters the hopper of the injection molding machine (4) through the material conveying pipe B (10), and finally the air is discharged through the exhaust fan; The material distribution discharge pipe (6) is evenly distributed at the bottom of the side wall of the material distribution tank (2), and the material distribution discharge pipe (6) is connected to the inside of the material distribution tank (2). A vertical pipe (14) is connected at the axis of the material distribution tank (2) so as to rotate around the axis of the material distribution tank (2). The top of the vertical pipe (14) is connected to the discharge pipe (5) through a feed connection pipe (19). The bottom end of the vertical pipe (14) is sealed, and a horizontal pipe (15) is provided at the bottom of the side wall of the vertical pipe (14). One end of the horizontal pipe (15) away from the vertical pipe (14) extends to the side wall of the material distribution tank (2). When the horizontal pipe (15) corresponds to the material distribution discharge pipe (6) under the action of the vertical pipe (14), the horizontal pipe (15) and the corresponding material distribution discharge pipe (6) are coaxial, and the inner diameter of the material distribution discharge pipe (6) matches the outer diameter of the horizontal pipe (15). A cloth pipe (16) is sleeved on one end of the transverse pipe (15) away from the vertical pipe (14); the outer diameter of the cloth pipe (16) matches that of the transverse pipe (15); when the transverse pipe (15) corresponds to the corresponding material distribution and discharge pipe (6) coaxially and air flows from the transverse pipe (15) into the material distribution and discharge pipe (6), the cloth pipe (16) extends into the material distribution and discharge pipe (6).

2. The centralized particulate material feeding system according to claim 1, characterized in that: The feed connection pipe (19) is fixedly connected to the top of the material distribution tank (2), and the feed connection pipe (19) passes downward through the top of the material distribution tank (2).

3. The centralized particulate material feeding system according to claim 2, characterized in that: The bottom of the feed connection pipe (19) is connected to a coaxially arranged rotating sleeve (20), the top of the stand pipe (14) is coaxially sealed and fixedly connected to the rotating sleeve (20), and the bottom end of the stand pipe (14) is rotatably connected to the axis of the tank bottom (12) of the distribution tank (2) via a bearing (21).

4. The centralized particulate material feeding system according to claim 1, characterized in that: A vertical piece B (27) is provided on a side wall of the vertical pipe (14) corresponding to a side of the horizontal pipe (15); a vertical piece A (25) is provided on a side wall of the vertical pipe (14) facing away from the horizontal pipe (15); the axes of the vertical piece A (25), the vertical piece B (27) and the horizontal pipe (15) are located in the same vertical plane passing through the axis of the vertical pipe (14); the vertical piece A (25) extends away from the edge of the vertical pipe (14) to the inner wall of the material distribution tank (2); and the vertical piece A (25) and the vertical piece B (27) form a guide air piece of the horizontal pipe (15).

5. The centralized particulate material feeding system according to claim 1, characterized in that: The material distribution discharge pipe (6) is inclined downward in a direction away from the axis of the material distribution tank (2), and a conical arc surface (13) is provided at the edge of the tank bottom (12) of the material distribution tank (2). The conical arc surface (13) is flush with the bottom of the inner wall of the material distribution discharge pipe (6), and the conical arc surface (13) is in contact with the bottom of the horizontal pipe (15).

6. The centralized particulate material feeding system according to claim 1, characterized in that: The end of the material distribution discharge pipe (6) away from the material distribution tank (2) is connected to the material conveying pipe A (7) through a curved pipe (17). The curved pipe (17) is connected to the material distribution discharge pipe (6), bends upward and then bends downward to form an "S" elbow. The two ends of the outer wall of the curved pipe (17) and the end of the outer wall of the material distribution discharge pipe (6) facing the curved pipe (17) are respectively provided with corresponding annular connection notches (23). The material distribution discharge pipe (6) and the curved pipe (17) are fixedly connected by an annular sealing clamp (18).

7. The centralized particulate material feeding system according to claim 6, characterized in that: An annular connecting groove is provided at one end of the inner side wall of the material distribution and discharge pipe (6) facing the bent pipe (17), and a connecting convex ring (22) is provided at one end of the bent pipe (17) connected to the material distribution and discharge pipe (6) for matching with the annular connecting groove.

8. The centralized particulate material feeding system according to claim 7, characterized in that: The inner wall of the connecting convex ring (22) is evenly provided with a plurality of oblique support rods (24), the oblique support rods (24) respectively extending toward the material distribution discharge pipe (6) and tilting toward the axis of the material distribution discharge pipe (6) along the direction pointing toward the material distribution discharge pipe (6), one end of the oblique support rod (24) extending out of the bent pipe (17) is fixedly connected to the axis of the material distribution discharge pipe (6), and when the bent pipe (17) is fixed to the material distribution discharge pipe (6) and when the cloth pipe (16) extends into the corresponding material distribution discharge pipe (6), one end of the oblique support rod (24) extending out of the bent pipe (17) extends into the pipe opening of the cloth pipe (16) away from the end of the transverse pipe (15).

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