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central feeding system

Manufacturing method of automatic feeding system of extruder

source：Central feeding system
Author：Central feeding system
time：2020-11-24 11:54:09

Injection molding automatic feeding
Manufacturing method of automatic feeding system of extruder
[Patent Abstract] This utility model discloses an automatic feeding system for an extruder, which belongs to the field of feeding devices for an extruder, and particularly relates to an automatic feeding system for an extruder with online automatic weighing and proportioning. It includes a console, a storage device, a weighing device, a mixing tank, and a feeding device; the storage device includes multiple raw material barrels, multiple raw material suction pipes, multiple sets of raw material vacuum suction devices, and multiple raw material storage devices connected in sequence. Material tank; the weighing device includes a plurality of weighing suction pipes, multiple sets of weighing suction solenoid valve sets, weighing main pipe, weighing platform connected in sequence; the mixing tank and the weighing platform are connected through a pipeline; The feeding device includes a feeding suction pipe, a feeding vacuum suction device, and a buffer hopper which are connected in sequence, and the buffer hopper is provided with a material level switch. This system fully automates weighing, formula, mixing, and conveying, improves efficiency, and realizes large-scale feeding; the raw materials are basically in a closed environment to avoid pollution.
【Patent Description】
Automatic feeding system for extruder
Technical field
[0001] This utility model relates to an extruder feeding system, in particular to an on-line automatic weighing and proportioning extruder automatic feeding system.
【Background technique】
[0002] In the plastic film extrusion process, each type of film has a unique formula. A film usually contains more than three types of plastic pellets. The traditional method is to take out various pellets from the warehouse, weigh them manually, and finish weighing After heavy, manually pour it into a mixer to stir and dry, then pour it into a small basket, use the small basket to transport to the hopper of the extruder, and use the suction machine to transport to the hopper. Defects: Weighing work is frequent, prone to problems, low work efficiency, frequent exchanges and waste of manpower, rubber particles must be placed next to the machine and repeatedly exposed to air pollution. The site is messy and unfavorable for production management. Especially when the production scale is large, and when feeding multiple extruders at the same time, the efficiency is low, and the feeding needs cannot be met.
[0003] The purpose of the present utility model is to provide an extruder automatic feeding system that splits flue gas and hot gas, with simple structure, fast baking, sanitary and environmentally friendly.
[0004] This utility model proposes an automatic feeding system for an extruder, including a console, a storage device, a weighing device, a mixing tank, and a feeding device;
[0005] The storage device includes multiple raw material barrels, multiple raw material suction pipes, multiple sets of raw material vacuum suction devices, and multiple raw material storage tanks connected in sequence;
[0006] The weighing device includes a plurality of weighing suction pipes, a plurality of weighing suction solenoid valves, a weighing main pipe, a weighing vacuum suction device, and a weighing platform connected in sequence; each weighing suction pipe The feed end of the pipe is connected to a raw material storage tank, and the other end is connected to a weighing and suction solenoid valve. Through the control of the weighing and suction solenoid valve, only one weighing and suction pipe is connected to the weighing main pipe at the same time. ；
[0007] The mixing tank is connected with the weighing platform through a pipeline, and a mixing blade is provided in the mixing tank;
[0008] The feeding device includes a feeding suction pipe, a feeding vacuum suction device, and a buffer hopper that are connected in sequence, and the buffer hopper is provided with a material level switch.
[0009] Preferably, the weighing platform includes a high-precision negative pressure weighing scale, the scale is provided with a weighing hopper, the lower part of the weighing hopper is provided with a discharge electric butterfly valve; the bottom of the mixing tank is provided with an induction switch.
[0010] The console is equipped with a man-machine interface and a host for setting the raw material formula, the console and the weighing and suction solenoid valve, the high-precision negative pressure weighing scale, the discharge electric butterfly valve, and the material level switch in the buffer hopper , The induction switch at the bottom of the mixing tank is electrically connected.
[0011] This feeding system can feed multiple extruders at the same time. When feeding multiple machines, the weighing platform is provided with multiple sets of high-precision negative pressure weighing scales and weighing hoppers connected with the weighing main pipe. Multiple weighing hoppers are respectively connected to multiple stirring tanks, multiple sets of feeding vacuum suction devices, multiple buffer hoppers, and multiple extruders in one-to-one correspondence.
[0012] When feeding by multiple machines, the host computer of the console cyclically scans the level switch status of each buffer hopper, and performs batching, mixing, and conveying according to the formula in turn.
[0013] The feed end of each weighing suction pipe is also equipped with a flow control valve group, which is linked with the weighing suction solenoid valve.
[0014] The flow control valve group includes a medium-speed valve and a low-speed valve. The medium-speed valve and the low-speed valve cooperate to control the suction flow to be low-speed, medium-speed or completely cut off.
[0015] The bottom of the raw material barrel is equipped with a universal wheel.
[0016] The beneficial effects of the present invention are: the medium speed valve and low speed valve of the flow control valve group are matched, and the electric control suction flow is low speed, medium speed or completely cut off, so as to complete the high-precision feeding action. At that time, the feeding is medium-speed feeding, and at the last 5KG, the feeding is low-speed to ensure that the weight error accuracy of feeding is within five thousandths; the weighing, formula, mixing, and conveying are fully automated, which improves the work Efficiency reduces manpower, reduces labor intensity, reduces the probability of errors, makes the raw materials basically in a closed environment, and reduces the possibility of pollution. In addition, the complete separation of raw materials and machines breaks the original manual workshop-style production method and completes automated flow operations, which is conducive to large-scale production and data statistics.
【Explanation of drawings】
[0017] FIG. 1 is not intended for the structure of the utility model;
[0018] Reference signs: raw material barrels 々, 8, (:, 0", ?, raw material storage tanks ^, 18, 1 (:, 10, ^, 1?, raw material vacuum suction devices 2A, 2B, 2C , 2D, 2E, 2F, weighing and suction solenoid valve group 3A, 3B, 3C, material level switch I, raw material suction pipe 2, extruder 3, weighing table 4, weighing hopper 5, discharge electric butterfly valve 6, Mixing tank 7, feed vacuum suction device 8, buffer hopper 9, high-precision negative pressure weighing scale 10, console 11, weighing suction tube 12, feeding suction tube 13, induction switch 14, weighing vacuum suction Device 15, flow control valve group 16, weighing main pipe 17.
[0019] The realization of the purpose of the utility model, functional characteristics and advantages will be combined with the embodiments, with reference to the attached
【Detailed ways】
[0020] Example One
[0021] With reference to Figure 1, this embodiment includes a console 11, a storage device, a weighing device, a stirring tank 7, and a feeding device; the storage device includes a plurality of raw material barrels A, B, C, D, E, F, multiple raw material suction pipes 2, multiple sets of raw material vacuum suction devices 2A, 2B, 2C, 2D, 2E, 2F, multiple raw material storage tanks 1A, 1B, 1C, 1D, 1E, 1F; The weighing device includes multiple weighing suction pipes 12, multiple weighing suction solenoid valves, weighing main pipe 17, weighing vacuum suction device 15, weighing platform 4 connected in turn; each weighing suction pipe Tube 12 is connected to a raw material storage tank at one end, and a weighing and suction solenoid valve 3A, 3B, 3C at the other end. Through the control of the weighing and suction solenoid valve, there is only one weighing and suction tube 12 at the same time. It communicates with the weighing main pipe 14; the mixing tank 7 is connected with the weighing platform 4 through a pipeline, and the mixing tank 7 is provided with a stirring blade; the feeding device includes a feeding suction pipe 13 connected in sequence, and a feeding vacuum suction Device 8, buffer hopper 9, and a material level switch I is arranged in the buffer hopper. The weighing platform includes a high-precision negative pressure weighing scale 10, a weighing hopper 5 is arranged on the scale, and a discharge electric butterfly valve 6 is arranged under the weighing hopper; an induction switch 14 is arranged at the bottom of the mixing tank. The console 11 is equipped with a man-machine interface and a host for setting raw material formula, the console and weighing and suction solenoid valves 3A, 3B, 3C, etc., high-precision negative pressure weighing scale 1, discharge electric butterfly valve 6, buffer The material level switch 1 in the hopper 9 and the induction switch 14 at the bottom of the mixing tank are electrically connected. This feeding system can feed multiple extruders at the same time. When feeding multiple machines, the weighing platform 4 is equipped with multiple sets of high-precision negative pressure weighing scales 10 and weighing hoppers 5 connected with the weighing main pipe. The multiple weighing hoppers 5 are respectively connected to multiple mixing tanks, multiple sets of feeding vacuum suction devices, multiple buffer hoppers, and multiple extruders in one-to-one correspondence. When feeding by multiple machines, the host computer of the console 11 scans the material level switch status of each buffer hopper cyclically, and performs batching, mixing, and conveying according to the formula in turn. A flow control valve group 16 is also installed at the feed end of each weighing suction pipe, and the flow control valve group 16 is linked with the weighing suction solenoid valves 3A, 3B, 3C. The flow control valve group 16 includes a medium-speed valve and a low-speed valve. The medium-speed valve and the low-speed valve cooperate to control the suction flow to be low-speed, medium-speed or completely cut off. When the low-speed valve and the medium-speed valve are both open, the suction flow rate is low; when the low-speed valve is closed and the medium-speed valve is opened, the suction flow is medium-speed. When both the low-speed valve and the medium-speed valve are closed, weigh the suction pipe Completely truncated. The bottom of the raw material barrel is equipped with a universal wheel, which is used to pour the raw material into the raw material barrel after unpacking in the unpacking workshop, and then push it to the raw material tank. The raw material tank has a large storage capacity and is fixed and cannot be moved. A universal wheel is installed at the bottom of the raw material barrel.
[0022] When working, first calculate the total weight of each rubber pellet required according to the total amount of the order, and take it out all at once in the warehouse. After unpacking, pour into 6 raw material barrels A, B, C, D, E, F, and then suck the corresponding 6 raw material storage tanks 1A through the raw material vacuum suction device 2A, 2B, 2C, 2D, 2E, 2F in turn , 1B, 1C, 1D, 1E, IF storage. Set the formula according to the production needs on the man-machine interface of the console 11, and turn on the switch, the feeding system enters the automatic working state. The host starts to scan the status of the material level switch I in the buffer hopper. When it detects that the material level switch I has a signal output, the system starts to open the weighing suction solenoid valve 3A and the rubber particles of the raw material bucket A according to the given formula. Enter the raw material storage tank 1A through the raw material suction pipe 2, the raw material vacuum suction device 3, pass through the weighing and suction solenoid valve 3A, the weighing vacuum suction device 15, and the weighing hopper 5 on the weighing platform 4, and count at the same time When the weight of the rubber particles sucked in the raw material storage tank IA reaches the set weight of the set formula table A material, the host closes the weighing and suction solenoid valve 3A; then sequentially opens the weighing and suction solenoid valves 3B, 3C, etc., The inhalation formula specifies the weight of other colloidal particles. After the inhalation of a formula is completed, the discharge electric butterfly valve 6 at the bottom of the weighing hopper 5 is automatically opened, and the mixed ABCDEF material is put into the lower mixing tank 7, and the mixing tank starts the stirring function after a delay, and stirs according to the set Stir the ingredients evenly over time. After the stirring action is completed, the feeding and conveying function is started. When feeding, the rubber is sucked from the mixing tank 7 to the buffer hopper 9 through the feeding vacuum suction device 8 until all the rubber particles in the mixing tank 7 are sucked, and the sensor switch at the bottom of the mixing tank senses that there are no rubber particles. , Automatically close the feeding vacuum suction device 8 ο So far, the feeding process according to the formula is finished.
[0023] In normal production, the buffer hopper 9 is directly installed on the top of the extruder 3, and is directly connected to the extruder hopper through a pipe, and the rubber particles in the buffer hopper 9 flow to the extruder hopper by their own weight. When the extruder 3 continuously extrudes the molten bat rubber, the rubber particles in the hopper of the extruder are continuously reduced, and the material in the buffer hopper 9 is automatically replenished, and the material level continues to drop until the material level is lower than the material level switch At I, restart the second recipe action.
[0024] This feeding system can feed multiple extruders at the same time. When feeding multiple machines, the weighing platform 4 is provided with multiple sets of high-precision negative pressure weighing scales 10 connected with the weighing main pipe and weighing The hopper 5 and the multiple weighing hoppers 5 are respectively connected to multiple mixing tanks, multiple sets of feeding vacuum suction devices, multiple buffer hoppers, and multiple extruders in one-to-one correspondence. When feeding by multiple machines, the host computer of the console 11 scans the material level switch status of each buffer hopper cyclically, and performs batching, mixing, and conveying according to the formula in turn.
[0025] The above descriptions are only preferred embodiments of the present utility model, and do not limit the scope of the present utility model. Any equivalent structural transformation made using the content of the utility model description and drawings, or directly or indirectly applied to related The technical fields of are included in the scope of patent protection of this utility model.
【Sovereignty Item】
1. An automatic feeding system for an extruder, characterized in that it comprises a console, a storage device, a weighing device, a stirring tank, and a feeding device; the storage device includes a plurality of raw material barrels and multiple Raw material suction pipes, multiple sets of raw material vacuum suction devices, multiple raw material storage tanks; the weighing device includes multiple weighing suction pipes, multiple weighing suction solenoid valves, weighing main pipes, weighing Heavy vacuum suction device, weighing platform; the feeding end of each weighing and suction pipe is connected to a raw material storage tank, and the other end is connected to a weighing and suction solenoid valve, which is controlled by the weighing and suction solenoid valve. At the same time, only one weighing suction pipe communicates with the weighing main pipe; the mixing tank is connected with the weighing platform through a pipeline, and the mixing tank is provided with a stirring blade; the feeding device includes a feeding suction pipe connected in sequence , Feeding vacuum suction device, buffer hopper, there is a level switch in the buffer hopper. 2. The automatic feeding system of the extruder according to claim 1, wherein the weighing platform comprises a high-precision negative pressure weighing scale, the scale is provided with a weighing hopper, and a lower part of the weighing hopper is provided Electric butterfly valve for feedstock; an induction switch is provided at the bottom of the mixing tank. 3. The automatic feeding system for the extruder according to claim 2, wherein the console is equipped with a man-machine interface for setting raw material formula, a host, a console and a weighing and suction solenoid valve, and high precision Negative pressure weighing scale, discharge electric butterfly valve, material level switch in the buffer hopper, and induction switch at the bottom of the mixing tank are electrically connected. 4. The automatic feeding system for extruder according to claim 3, characterized in that the feeding system can feed multiple extruders at the same time, and when multiple machines are feeding, multiple sets of weighing platform are provided High-precision negative pressure weighing scale and weighing hopper connected to the weighing main pipe, multiple weighing hoppers and multiple mixing tanks, multiple sets of feeding vacuum suction devices, multiple buffer hoppers, multiple extruders — -Connect in sequence accordingly. 5. The automatic feeding system for an extruder according to claim 4, characterized in that when multiple machines are feeding, the host of the console scans the material level switch status of each buffer hopper in turn, and performs batching, stirring, delivery. 6. The automatic feeding system for the extruder according to claim 1, wherein the feed end of each weighing suction pipe is also equipped with a flow control valve group, and the flow control valve group is connected to the weighing suction pipe. Material solenoid valve linkage. 7. The automatic feeding system for an extruder according to claim 6, wherein the flow control valve group includes a medium-speed valve and a low-speed valve, and the medium-speed valve and the low-speed valve cooperate to control the suction flow as low-speed and medium-speed. Or completely truncated. 8. The automatic feeding system for an extruder according to claim 1, wherein the bottom of the raw material barrel is equipped with a universal wheel.