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Manufacturing method of automatic weighing mixer


source:[Gravimetric blender]   release time:2021-03-19 11:36:11




Plastics use monomers as raw materials, and additives of different formulations are added to achieve the required physical and chemical properties. In the injection molding process of plastics, the plastic raw materials used for injection are usually made by mixing plastic particles with different components. In order to ensure that the injection molded plastic parts can achieve the expected physical and chemical properties, the weight ratio of the plastic particles of different components must be strictly controlled. The plastic particles should be weighed before mixing. The traditional methods mostly use manual weighing. , Manual weighing will produce various errors, and the weight ratio of each component cannot meet the requirements of the production process, resulting in injection molded plastic parts that cannot meet the requirements of relevant technical standards and expected physical and chemical properties.
Technical realization elements:
In order to solve the above-mentioned technical problem of manual weighing error, this utility model provides an automatic weighing mixer.
The technical scheme of the utility model is as follows:
Automatic weighing mixer, including a base, the base is provided with a mixing structure, the mixing structure is provided with a storage structure, the storage structure is provided with a suction structure, and the mixing structure includes a lower mixing zone And the upper metering area, the suction structure includes a suction hopper and a vacuum structure.
The storage structure includes a storage hopper.
A mixing motor and a mixing blade are arranged in the middle of the mixing zone, and the mixing blade is fixedly connected with the mixing motor, and the mixing blade is longitudinally arranged in the middle of the mixing zone.
The side of the mixing structure is provided with a control display screen.
The suction hopper is provided with a suction observation window.
The storage hopper is provided with a storage observation window.
Manufacturing method of automatic weighing mixer
The bottom of the storage hopper is provided with a baffle plate, and the baffle plate is connected with the turning plate motor.
A baffle plate is arranged at the bottom of the mixing zone, and the baffle plate is connected with the plate turning motor.
The vacuum structure includes a vacuum chamber above the suction hopper and two suction pipes connected with the vacuum chamber, one suction pipe is connected with the vacuum motor, and the other suction pipe is connected with the raw material storage tank.
Using the technical scheme of the utility model, the structure is novel, the design is ingenious, the weight measurement of each raw material is accurate, and the error in the manual measurement and transportation process is eliminated. The ratio of each raw material is completely in accordance with the set parameters, so that the composition of different raw materials is in accordance with the ratio Evenly mixed, the final injection molded plastic parts can meet the requirements of relevant technical standards and expected physical and chemical properties.
The utility model will be further explained below in conjunction with the accompanying drawings.
The automatic weighing mixer shown in Figures 1 to 4 includes a base 1, a mixing structure, a storage structure, and a suction structure. The mixing structure, storage structure, and suction structure are installed from the base 1 upwards. The base 1 is provided with a mixing structure, the mixing structure is provided with a storage structure, and the storage structure is provided with a suction structure. The lower end of the base 1 is provided with 4 feet, and an accommodation space is formed between the feet for installation Other mechanical equipment used to collect the raw materials for the mixing step. The middle part of the base 1 penetrates to form a discharging port, and a mixing structure is arranged above the discharging port. The mixing structure includes a lower mixing zone 2 and an upper metering zone 3, which absorb The material structure includes a suction hopper 4 and a vacuum structure 5. A metering bucket 11 is provided in the middle of the metering area 3, and the metering bucket 11 is connected to a metering scale. The two ends of the metering bucket 11 are connected to the bucket motor through a connecting shaft 12, and the metering bucket 11 is The connecting shaft 12 is centered and can be rotated. The raw material enters the metering bucket 11 from the top, and the metering is performed. When the set weight is reached, the upper structure stops feeding, the bucket motor moves, the metering bucket 11 flips, and the raw material in the metering bucket 11 falls. In the mixing zone 2 at the lower part of the mixing structure, a mixing motor and a mixing blade 10 are arranged in the middle of the mixing zone 2. The mixing blade 10 is fixedly connected with the mixing motor, and the mixing blade 10 is arranged longitudinally in the mixing zone. In the middle of zone 2, the raw materials weighed from above fall into the mixing zone 2, the mixing motor is started, the mixing blade 10 rotates in the longitudinal plane, and the raw materials in the mixing zone 2 are stirred and mixed to make different raw material components Mix uniformly according to the ratio, and the final injection molded plastic parts can meet the requirements of relevant technical standards and expected physical and chemical properties. Further, the mixing blade 10 can be any of cross blades, spiral blades and paddle blades. The bottom of the mixing zone 2 is provided with a baffle. One end of the baffle is connected with the bottom of the mixing zone 2 by a hinge. The baffle is connected with a flap motor. When the baffle is closed, the bottom of the mixing zone 2 is sealed to prevent the raw materials from being stirred. Leaking downwards. After the raw materials in the mixing zone 2 complete the mixing step, the flap motor moves, and the other end of the baffle rotates downwards. The mixed raw materials fall into the lower mechanical structure from the material opening in the middle of the base 1 to proceed. In the next processing step, a control display screen 7 is provided on the side of the mixing structure, and the current operation status is displayed on the display screen 7, and the position of the abnormal part is displayed on the display screen 7 when there is an abnormal state of a component, which is convenient for quick maintenance.

A storage structure is arranged above the mixing structure. The storage structure includes a storage hopper 6. The upper part of the storage hopper 6 is a square shape for receiving the upper suction structure. The inner diameter of the lower part of the storage hopper 6 is gradually reduced, and the lower side of the storage hopper 6 is inclined. It is set to ensure that all the raw materials in the storage hopper fall to the lower end of the storage hopper 6. The storage hopper 6 is divided into 6 storage spaces horizontally. The storage spaces are distributed longitudinally, and the storage spaces are isolated. Up to 6 different types can be stored at the same time. The lower part of the storage hopper 6 is equipped with a storage observation window 9. Each storage space corresponds to a storage observation window 9. The storage observation window 9 is made of transparent material. The situation in the storage hopper 6 can be observed with the naked eye, which is convenient for observing the storage. The condition of the raw materials in the hopper 6 is convenient for early detection when an abnormal situation occurs. The bottom of the storage hopper 6 is equipped with a baffle, and a separate baffle is set at the bottom of each storage space. One end of the baffle is connected with the bottom of the storage hopper 6 by a hinge. The plate is connected with the flap motor. When the baffle is closed, the bottom of the storage hopper 6 is sealed to prevent the raw material from leaking downward. After the signal is released, the flap motor moves, and the other end of the baffle rotates downward, and the raw material falls from the storage space. Go to the weighing bucket 11 below and proceed to the next step of processing.
There is a suction structure above the storage structure, which includes a suction hopper 4 and a vacuum structure 5, corresponding to the 6 storage spaces of the storage hopper 6, a total of 6 sets of suction structures and 6 sets of suction structures are provided The 6 storage spaces of the storage hopper 6 correspond and connect one by one. The lower end of the suction hopper 4 is connected with the upper end of the storage hopper 6. The vacuum structure 5 is located at the upper end of the suction hopper 4. The suction hopper 4 is cylindrical, which facilitates the smooth dropping of raw materials. In the storage hopper 6, the suction hopper 4 is equipped with a suction observation window 8, which can be visually observed in the suction hopper 4, which is convenient for observing the situation of the raw materials in the suction hopper 4, and is convenient for early detection in case of abnormal conditions. Vacuum structure 5 It includes a vacuum chamber above the suction hopper 4 and two suction pipes connected to the vacuum chamber. One end of a suction pipe is connected to the upper end of the vacuum chamber, and the other end is connected in parallel to the vacuum motor. 6 vacuum chambers are connected in parallel. It shares a suction pipe connected to the vacuum motor, no need to equip a separate vacuum motor, which saves energy and improves operation stability. There is a solenoid valve at the upper end of the vacuum chamber and the connection part of the suction pipe to control the distance between the upper end of the vacuum chamber and the suction pipe. On and off, one end of the other straw is connected to the side of the vacuum chamber, and the other end is inserted into each raw material storage tank. A sensor is installed in the middle of the suction hopper 4 to sense the height change of the raw material in the suction hopper 4. When the height of the raw material cannot reach the height of the sensor, that is, when the raw material reserve is insufficient, the sensor sends a signal of insufficient raw material to the control system, and the control system sends a signal to open the solenoid valve to the solenoid valve after rapid processing. The solenoid valve is energized to open, and the vacuum chamber and the suction tube are vacuumed. There is conduction between the vacuum chamber and the vacuum motor, and the vacuum chamber forms an almost vacuum state. The raw material in the raw material storage tank is sucked into the vacuum chamber through a straw through the siphon principle, and then under the action of gravity When the raw material falls into the suction hopper 4, when the raw material exceeds the height of the sensor, the sensor stops sending out the signal of insufficient raw material. After the control system fails to receive the signal, it sends a signal to close the solenoid valve. The solenoid valve is de-energized and closed, and the vacuum chamber and the straw are drawn. The intermediate passage is closed, the vacuum chamber and the vacuum motor are disconnected, and the suction process ends.
The flap motor, mixing motor, tipping bucket motor, metering scale, display screen 7, inductor, solenoid valve and vacuum motor are connected to the control system, the control system includes PLC, and the PLC input terminal is connected to the switch, the sensor and the metering scale , The output terminal is connected to the turning plate motor, the mixing motor, the tipping bucket motor, the display screen 7, the solenoid valve and the vacuum motor to ensure the smooth and orderly completion of the production process.

When in use, the vacuum motor is running, and the raw materials are sucked into the suction hopper 4 through the suction pipe, and then stored in each storage space in the storage hopper 6. When the raw materials in each suction hopper 4 are insufficient during operation, they can be replenished by themselves. The baffle at the bottom of the storage hopper 6 is opened, and the raw materials enter the weighing hopper 11 for measurement. The weight of each raw material is proportioned according to the set parameters, and the baffle is closed when the movable weight is reached, and the metering hopper 11 is turned over to pour the raw materials. Enter the mixing zone 2 and wait for all the raw materials to be poured into the mixing motor to start, and drive the mixing blade 10 to mix the raw materials evenly. After the mixing is completed, the mixing motor is turned off, and the baffle at the bottom of the mixing zone 2 is opened. The raw materials fall into the mechanical structure below the base 1, and proceed to the next step. The weight of each raw material is accurately measured, eliminating errors in manual measurement and transportation. The ratio of each raw material is completely in accordance with the set parameters, so that the components of the different raw materials are evenly mixed according to the ratio, and the final injection molded plastic parts can meet the relevant technical standards The requirements and expected physical and chemical properties.
It should be understood that the above descriptions are only preferred embodiments of the present utility model, and are not sufficient to limit the technical solutions of the present utility model. For those of ordinary skill in the art, within the spirit and principle of the present utility model, Additions, deletions, substitutions, transformations or improvements can be made according to the above description, and all the technical solutions after these additions, substitutions, transformations or improvements should fall within the protection scope of the appended claims of the present utility model.
The new type relates to the technical field of mixers, especially automatic weighing mixers. Automatic weighing mixer, including a base, the base is provided with a mixing structure, the mixing structure is provided with a storage structure, the storage structure is provided with a suction structure, and the mixing structure includes a lower mixing zone And the upper metering area, the suction structure includes a suction hopper and a vacuum structure. The utility model has the advantages that the weight of each raw material is accurately measured, eliminating errors in manual measurement and transportation, and the ratio of each raw material is completely in accordance with the set parameters, so that different raw material components are uniformly mixed according to the ratio, and finally injection molded The plastic parts can meet the requirements of relevant technical standards and expected physical and chemical properties.[Gravimetric blender]