A weighing type mixing metering unit

Abstract

The present invention belongs to the technical field of mixing masterbatches with additives, and specifically relates to a weighing type mixing and metering unit, which includes a weight mixer assembly and a batch weighing sensor, wherein the weight mixer assembly includes four hoppers, a shutter assembly, a weight mixing chamber, a motor, a mixing chamber, a lifting chamber and a lifting cylinder; the four hoppers are fixedly installed above the weight mixing chamber, the shutter assembly is arranged between the hopper and the weight mixing chamber, the motor is fixedly installed on one side of the weight mixing chamber, the mixing chamber is fixedly installed on the bottom of the inner wall of the weight mixing chamber, the top of the mixing chamber is open, and the lifting chamber is slidably connected to the upper inner wall of the mixing chamber, and the lifting cylinder is fixedly installed on the inner wall of the weight mixing chamber. The device solves the problem that the current mixing of masterbatches and additives cannot accurately control the amount of the two, resulting in reduced mixing quality.

Description

Technical Field

[0001] The invention belongs to the technical field of mixing masterbatches and additives, and in particular relates to a weighing type mixing and metering unit. Background Art

[0002] In the injection molding process, products of different colors need to be matched with masterbatches of different colors, and the weight of additives and masterbatch pigments will obtain different color depths at different weight ratios. The mixing equipment is mainly completed by the masterbatch weighing and metering device, and the commonly used masterbatch weighing and metering mechanism is a unified weight measurement, which cannot weigh the masterbatch and additives independently, and the weighed masterbatch and additives cannot be fully mixed, resulting in poor mixing quality. Summary of the invention

[0003] The object of the present invention is to provide a weighing type mixing and metering unit to solve the problems raised in the above background technology.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a weighing type mixing and metering unit, comprising a weight mixer assembly and a batch weighing sensor, wherein the weight mixer assembly comprises four hoppers, a shutter assembly, a weight mixing chamber, a motor, a mixing chamber, a lifting chamber and a lifting cylinder; the four hoppers are fixedly installed above the weight mixing chamber, the shutter assembly is arranged between the hopper and the weight mixing chamber, the motor is fixedly installed on one side of the weight mixing chamber, the mixing chamber is fixedly installed on the bottom of the inner wall of the weight mixing chamber, and the The top of the mixing chamber is open, and the lifting chamber is slidably connected to the upper inner wall of the mixing chamber. The lifting cylinder is fixedly installed on the inner wall of the weight mixing chamber, and the output end is connected to the edge of the lifting chamber. The lifting chamber is located below the shutter assembly, and a through hole is opened at the bottom. A weighing plate is embedded in the inner wall of the through hole. The batch weighing sensor is arranged inside the weighing plate. A weight sensing module is arranged inside the batch weighing sensor. The weight sensing module is used to sense the weight of the masterbatch and different additives above it through the weighing plate, and perform mixing and weighing.

[0005] The present invention further illustrates that a mixing mechanism is arranged inside the mixing chamber, and the mixing mechanism includes a rotating shaft and three groups of stirring shafts. The rotating shaft bearing is installed on the bottom of the inner wall of the mixing chamber, and the upper end is fixed to the bottom of the weighing plate. Two stirring shafts are arranged in each of the three groups, and are relatively fixedly installed on the left and right sides of the rotating shaft; a toothed disk is fixed on the outer side of the bottom of the rotating shaft, and a gear is arranged on the left side of the interior of the mixing chamber, and the gear is fixed to the output end of the motor and meshes with the toothed disk.

[0006] The present invention further illustrates that a telescopic joint is fixedly installed on the inner wall of the mixing chamber, a sphere is fixed on the front end of the telescopic joint, the interior of the middle group of stirring shafts are all hollow, and a push-pull plate is slidably connected to the inner wall, a push-pull rod is fixed on one side of the push-pull plate, the outer end of the push-pull rod is spherical, and contacts the sphere after rotation; an elastic spring is fixed between the outer side of the push-pull plate and the inner wall of the stirring shaft, and the elastic spring is sleeved on the outer side of the push-pull rod, a blowing chamber is fixed above the weighing plate, the interior of the blowing chamber is hollow, and a plurality of blowing holes are opened around it, the interior of the rotating shaft is provided with holes, and the two ends of the holes are respectively connected with the interior of the stirring shaft and the interior of the blowing chamber.

[0007] The present invention further illustrates that a hydraulic chamber is fixed to the inner wall of the mixing chamber, and a hydraulic plate is slidably connected to the inner wall of the hydraulic chamber, a threaded rod is fixed to one side of the hydraulic plate, a threaded hole is arranged on the left side of the hydraulic chamber, the threaded rod is threadedly connected to the threaded hole, and a plug-in rod is fixed to the outer end, and a limit block is arranged on the outer side of the plug-in rod, a rotating tooth is meshed on the upper right side of the toothed disk, a sleeve is fixed to the right end of the rotating tooth, and a plug-in hole is arranged inside the sleeve, and a notch is arranged on the inner side of the plug-in hole, the plug-in rod is plugged into the notch of the plug-in hole through the limit block, and thus is clamped in the sleeve; hydraulic oil is arranged on the right side of the hydraulic plate, and a liquid inlet pipe and a liquid extraction pipe are connected to the telescopic joint on the right side, and pressure valves are arranged in both the liquid inlet pipe and the liquid extraction pipe.

[0008] The present invention further illustrates that extrusion rods are fixed on both sides of the left and right sides of the rotating shaft, the extrusion rod is located above the middle stirring shaft, and the outer end of the extrusion rod is spherical, and the outer end of the extrusion rod is located on the inner side of the outer end of the push-pull rod; the sphere moves forward, and the extrusion rod contacts the sphere after rotation; the middle of the rotating shaft is in a disconnected state, and a socket is provided below the disconnected portion, a slot is provided inside the socket, an insertion rod is provided above the disconnected portion, and a protrusion is provided on the outer side of the insertion rod, the insertion rod is inserted into the slot of the socket through the protrusion, and the two are engaged with each other.

[0009] The present invention further illustrates that a number of revolutions control module is disposed inside the motor, the number of revolutions control module is electrically connected to the weight sensing module, and the number of revolutions control module is used to control the number of revolutions of the motor in clockwise and counterclockwise directions according to the total weight of the masterbatch and different additives; the control mode of the number of revolutions control module is: , is the number of clockwise and counterclockwise rotations of the motor, The maximum number of clockwise and counterclockwise rotations of the motor. is the total weight of masterbatch and different additives, The maximum load-bearing capacity of the weighing plate.

[0010] The present invention further illustrates that the number of clockwise and counterclockwise rotations of the motor is: = The pressure valve opens.

[0011] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the mixing metering unit adopted by the present invention senses the weight of the masterbatch and the additive through the weight sensing module, and adds the weights to obtain the total weight, mixes the masterbatch and the additive, and weighs them, which is more convenient and more efficient to operate, and the use of the masterbatch and the additive can be controlled with high precision to avoid excessive or insufficient input affecting the mixing quality;

[0012] In addition, during the mixing process, the masterbatch and additives are stirred and fused to speed up the fusion efficiency, and the motor rotates clockwise for several turns first, and then counterclockwise for several turns, so that the stirring can be more sufficient, and the mixing quality and efficiency are greatly improved. At the same time, the rotation of the shaft drives the weighing plate to rotate, so that the masterbatch and additives attached to the weighing plate are inertial and thrown off the weighing plate, thereby improving the weight accuracy after mixing and avoiding the reduction of the quality after mixing due to inaccurate weight when mixing the masterbatch or additives. At the same time, the blowing holes around the blowing cavity eject airflow to push the masterbatch and additives on the weighing plate, so that they fall from the edge of the weighing plate, and further clean the residual masterbatch and additives on the weighing plate;

[0013] When the masterbatch and additives are heavier, the stirring shaft moves upward and falls instantly, which can shake the mixed masterbatch and additives, thereby further improving the mixing efficiency, fully mixing the two and improving the mixing quality. At the same time, the weighing plate also moves upward and then falls quickly, thereby generating shaking, which can further shake off the masterbatch and additives above it. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 It is a front view of the present invention;

[0017] Figure 3 It is a plan view of the internal structure of the weight mixing chamber of the present invention;

[0018] Figure 4 It is a schematic diagram of the positional relationship between the mixing chamber and the lifting chamber of the present invention;

[0019] Figure 5 It is a schematic diagram of the internal structure of the mixing chamber of the present invention;

[0020] Figure 6 is a plan view of the mixing chamber of the present invention;

[0021] Figure 7 It is a schematic diagram of the internal structure of the stirring shaft and the rotating shaft of the present invention;

[0022] Figure 8 It is a schematic diagram of the internal structure of the hydraulic chamber and the sleeve of the present invention;

[0023] Fig. 9 It is a schematic diagram of the movement process of the ball, the extrusion rod and the push-pull rod when the telescopic joint of the present invention is retracted;

[0024] Fig.10 It is a schematic diagram of the movement process of the ball, the extrusion rod and the push-pull rod when the telescopic joint of the present invention is extended;

[0025] In the figure: 1. hopper; 2. weight mixing chamber; 3. motor; 4. mixing chamber; 41. rotating shaft; 411. toothed disc; 412. hole; 413. extrusion rod; 42. stirring shaft; 421. push-pull plate; 422. push-pull rod; 423. elastic spring; 43. gear; 44. telescopic joint; 441. sphere; 45. hydraulic chamber; 451. hydraulic plate; 452. threaded rod; 453. plug-in rod; 46. rotating gear; 461. sleeve; 47. pressure valve; 48. socket; 49. plug-in rod; 5. lifting chamber; 6. lifting cylinder; 7. weighing plate; 71. blowing chamber. DETAILED DESCRIPTION

[0026] The following is a further non-limiting detailed description of the technical solution of the present invention in conjunction with the preferred embodiments and the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figure 1-10 , the present invention provides a technical solution: a weighing type mixing and metering unit, including a weight mixer assembly and a batch weighing sensor, the weight mixer assembly includes four hoppers 1, a shutter assembly, a weight mixing chamber 2, a motor 3, a mixing chamber 4, a lifting chamber 5 and a lifting cylinder 6;

[0028] Four hoppers 1 are fixedly installed above the weight mixing chamber 2, the shutter assembly is arranged between the hopper 1 and the weight mixing chamber 2, the motor 3 is fixedly installed on one side of the weight mixing chamber 2, the mixing chamber 4 is fixedly installed at the bottom of the inner wall of the weight mixing chamber 2, the top of the mixing chamber 4 is open, and the lifting chamber 5 is slidably connected to the upper inner wall of the mixing chamber 4, the lifting cylinder 6 is fixedly installed on the inner wall of the weight mixing chamber 2, and the output end is connected to the edge of the lifting chamber 5, the lifting chamber 5 is located below the shutter assembly, and a through hole is opened at the bottom, and a weighing plate 7 is embedded in the inner wall of the through hole, and a batch weighing sensor is arranged inside the weighing plate 7, and a weight sensing module is arranged inside the batch weighing sensor, and the weight sensing module is used to sense the weight of the masterbatch and different additives above it through the weighing plate 7, and perform mixed weighing;

[0029] The operator puts the masterbatch into the weight mixing chamber 2 through one of the hoppers 1, and the masterbatch falls into the lifting chamber 5 through the shutter assembly, and is located on the weighing plate 7. The batch weighing sensor inside it senses the weight of the masterbatch through the weight sensing module, and then the lifting cylinder 6 runs to drive the lifting chamber 5 to lift, and the through hole at the bottom of the lifting chamber 5 is separated from the weighing plate 7, and the masterbatch flows into the mixing chamber 4. Then the lifting cylinder 6 is reset, and the weighing plate 7 fits with the through hole again. At this time, through the other three hoppers 1, according to the above steps, different additives are put into the weight mixing chamber 2 in batches, and the weight sensing module senses the weight of the masterbatch and the additive, and adds the weight to obtain the total weight, and mixes the masterbatch and the additive, and weighs them. The operation is convenient and more convenient, and the use of the masterbatch and the additive can be controlled with high precision to avoid excessive or insufficient input affecting the mixing quality.

[0030] A mixing mechanism is provided inside the mixing chamber 4, and the mixing mechanism includes a rotating shaft 41 and three groups of stirring shafts 42. The rotating shaft 41 is mounted on the bottom of the inner wall of the mixing chamber 4, and the upper end is fixed to the bottom of the weighing plate 7. Two of the three groups of stirring shafts 42 are provided and relatively fixedly installed on the left and right sides of the rotating shaft 41.

[0031] A toothed disc 411 is fixed to the outer side of the bottom of the rotating shaft 41, and a gear 43 is provided on the left side of the interior of the mixing chamber 4. The gear 43 is fixed to the output end of the motor 3 and meshes with the toothed disc 411.

[0032] After the masterbatch and the additive fall into the mixing chamber 4, the motor 3 runs, and drives the gear 43 to rotate through its output end, and the gear 43 drives the toothed disc 411 to rotate through meshing, and the toothed disc 411 drives the rotating shaft 41 to rotate, thereby driving the three groups of stirring shafts 42 to rotate around the center, stirring and fusing the masterbatch and the additive, and accelerating the fusion efficiency, and the motor 3 first rotates clockwise for several circles, and then rotates counterclockwise for several circles, so that the stirring can be more sufficient, and the mixing quality and efficiency are greatly improved;

[0033] At the same time, the rotation of the shaft 41 drives the weighing plate 7 to rotate, so that the masterbatch and additives attached to the weighing plate 7 are thrown off from the weighing plate 7 due to inertia, thereby improving the weight accuracy after mixing and avoiding the reduction of the quality after mixing due to inaccurate weight when mixing the masterbatch or additives.

[0034] The inner wall of the mixing chamber 4 is fixedly mounted with a telescopic joint 44, the front end of which is fixed with a sphere 441, the interior of the middle group of stirring shafts 42 is hollow, and a push-pull plate 421 is slidably connected to the inner wall, a push-pull rod 422 is fixed to one side of the push-pull plate 421, the outer end of the push-pull rod 422 is spherical, and contacts the sphere 441 after rotation;

[0035] An elastic spring 423 is fixed between the outer side of the push-pull plate 421 and the inner wall of the stirring shaft 42, and the elastic spring 423 is sleeved on the outer side of the push-pull rod 422. A blowing cavity 71 is fixed above the weighing plate 7. The inside of the blowing cavity 71 is hollow and has a plurality of blowing holes around it. A hole 412 is provided inside the rotating shaft 41, and the two ends of the hole 412 are respectively connected to the inside of the stirring shaft 42 and the inside of the blowing cavity 71.

[0036] When the stirring shaft 42 rotates around the center, the middle group of stirring shafts 42 drives the push-pull rods 422 to contact the sphere 441, and rub and squeeze each other. The push-pull rods 422 are forced to push the push-pull plate 421 to slide inward along the inner wall of the stirring shaft 42, and the elastic spring 423 is deformed under the force. The gas inside the push-pull plate 421 is squeezed into the hole 412, and then enters the blowing cavity 71, and finally sprayed out from the blowing holes around the blowing cavity 71. The airflow pushes the masterbatch and additives on the weighing plate 7, causing them to fall from the edge of the weighing plate 7, thereby further cleaning the residual masterbatch and additives on the weighing plate 7.

[0037] A hydraulic chamber 45 is fixed to the inner wall of the mixing chamber 4, and a hydraulic plate 451 is slidably connected to the inner wall of the hydraulic chamber 45. A threaded rod 452 is fixed to one side of the hydraulic plate 451. A threaded hole is set on the left side of the hydraulic chamber 45. The threaded rod 452 is threadedly connected in the threaded hole, and a plug-in rod 453 is fixed to the outer end, and a limit block is set on the outer side of the plug-in rod 453. A rotating tooth 46 is meshed on the upper right side of the toothed disc 411, and a sleeve 461 is fixed to the right end of the rotating tooth 46. A plug-in hole is set inside the sleeve 461, and a notch is set on the inner side of the plug-in hole. The plug-in rod 453 is plugged into the notch of the plug-in hole through the limit block, so as to be clamped in the sleeve 461.

[0038] The right side of the hydraulic plate 451 is provided with hydraulic oil, and the right side is connected to the telescopic joint 44 with a liquid inlet pipe and a liquid extraction pipe, and pressure valves 47 are provided in the liquid inlet pipe and the liquid extraction pipe;

[0039] When the toothed disc 411 rotates, the rotating gear 46 is driven to rotate by meshing, and the rotating gear 46 drives the sleeve 461 to rotate. The sleeve 461 drives the plug-in rod 453 to rotate through the plug-in hole, and the plug-in rod 453 drives the threaded rod 452 to rotate, so that it moves to the right through the threaded hole, thereby driving the hydraulic plate 451 to slide to the right along the inner wall of the hydraulic chamber 45, and the hydraulic oil on the right side of the hydraulic plate 451 is squeezed into the liquid inlet pipe. When the pressure in the liquid inlet pipe reaches the pressure bearing limit of the pressure valve 47, the pressure valve 47 opens, and the hydraulic oil instantly enters the expansion joint 44 through the pipeline to extend it. The extension of the expansion joint 44 drives the ball 441 to move forward, thereby increasing the contact area between the ball 441 and the spherical part of the outer end of the push-pull rod 422, thereby increasing the distance that the push-pull rod 422 is squeezed to move, and the intensity of the gas blown out of the blowing hole is increased, thereby further strengthening the blowing force on the masterbatch and additives on the weighing plate 7, so that they can fully fall into the mixing chamber 4.

[0040] Extrusion rods 413 are fixed on both the left and right sides of the rotating shaft 41. The extrusion rods 413 are located above the central stirring shaft 42, and the outer ends of the extrusion rods 413 are spherical. The outer ends of the extrusion rods 413 are located inside the outer ends of the push-pull rods 422.

[0041] The ball 441 moves forward, and the extrusion rod 413 rotates to contact the ball 441;

[0042] The middle of the rotating shaft 41 is disconnected, and a plug hole 48 is provided below the disconnected portion, a slot is provided inside the plug hole 48, an insertion rod 49 is provided above the disconnected portion, and a protrusion is provided outside the insertion rod 49, and the insertion rod 49 is inserted into the slot of the plug hole 48 through the protrusion, and they are mutually engaged;

[0043] Through the above steps, after the ball 441 moves forward, it squeezes and rubs against the squeezing rod 413, and the squeezing rod 413 is squeezed and moved upward, driving the rotating shaft 41 to move upward. The rotating shaft 41 passes through the plug rod 49 at the bottom, so that the plug rod 49 slides upward along the inner wall of the socket 48, thereby lifting it. When the squeezing rod 413 is out of contact with the ball 441, the rotating shaft 41 falls instantly due to the influence of gravity, thereby causing the stirring shaft 42 to fall instantly, which can shake the mixed masterbatch and additives, thereby further improving the mixing efficiency, fully mixing the two, and improving the mixing quality. At the same time, the weighing plate 7 also moves upward and then quickly falls, thereby generating shaking, which can further shake off the masterbatch and additives above it.

[0044] The motor 3 is provided with a revolution control module, which is electrically connected to the weight sensing module. The revolution control module is used to control the clockwise and counterclockwise revolutions of the motor 3 according to the total weight of the masterbatch and different additives.

[0045] The control method of the circle control module is: , is the number of clockwise and counterclockwise rotations of motor 3, is the maximum number of clockwise and counterclockwise rotations of motor 3, is the total weight of masterbatch and different additives, is the maximum load-bearing capacity of the weighing plate 7;

[0046] The heavier the masterbatch and additives are, the more clockwise and counterclockwise revolutions the motor 3 makes, the greater the mixing intensity is, the higher the mixing efficiency is, and the better the mixing quality is. Conversely, the fewer clockwise and counterclockwise revolutions the motor 3 makes, which on the one hand ensures the mixing effect, and on the other hand reduces energy consumption.

[0047] The number of clockwise and counterclockwise rotations of motor 3 is: = When , the pressure valve 47 opens;

[0048] When the number of clockwise and counterclockwise rotations of the motor 3 reaches the maximum, the pressure valve 47 opens, thereby injecting and extracting hydraulic oil into the telescopic joint 44 to extend and retract it. When the weight of the masterbatch and additives is heavier, it means that their quantity is large. At this time, the residual amount on the weighing plate 7 will also increase relatively. At the same time, the mixing strength also needs to be relatively improved, so that the masterbatch and additives invested are fully used and mixed to fully ensure the mixing quality. Otherwise, normal stirring is maintained to reduce structural wear and increase service life.

[0049] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0050] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A weighing type mixing and metering unit, comprising a weight mixer assembly and a batch weighing sensor, characterized in that: The gravimetric mixer assembly comprises four hoppers (1), a shutter assembly, a gravimetric mixing chamber (2), a motor (3), a mixing chamber (4), a lifting chamber (5) and a lifting cylinder (6); The four hoppers (1) are all fixedly mounted above the weight mixing chamber (2); the shutter assembly is arranged between the hopper (1) and the weight mixing chamber (2); the motor (3) is fixedly mounted on one side of the weight mixing chamber (2); the mixing chamber (4) is fixedly mounted on the bottom of the inner wall of the weight mixing chamber (2); the top of the mixing chamber (4) is open, and the lifting chamber (5) is slidably connected to the upper inner wall of the mixing chamber (4); the lifting cylinder (6) is fixedly mounted on the inner wall of the weight mixing chamber (2), and the output end is connected to the edge of the lifting chamber (5); the lifting chamber (5) is located below the shutter assembly, and a through hole is provided at the bottom; a weighing plate (7) is embedded in the inner wall of the through hole; the batch weighing sensor is arranged inside the weighing plate (7); a weight sensing module is arranged inside the batch weighing sensor; the weight sensing module is used to sense the weight of the masterbatch and different additives above it through the weighing plate (7) and perform mixing and weighing.

2. A weighing type mixing and metering unit according to claim 1, characterized in that: A mixing mechanism is provided inside the mixing chamber (4), the mixing mechanism comprising a rotating shaft (41) and three groups of stirring shafts (42); the bearing of the rotating shaft (41) is mounted on the bottom of the inner wall of the mixing chamber (4), and the upper end is fixed to the bottom of the weighing plate (7); two of the three groups of stirring shafts (42) are provided, and are relatively fixedly mounted on the left and right sides of the rotating shaft (41); A toothed disc (411) is fixed to the outside of the bottom of the rotating shaft (41), and a gear (43) is provided on the left side of the interior of the mixing chamber (4). The gear (43) is fixed to the output end of the motor (3) and meshes with the toothed disc (411).

3. A weighing type mixing and metering unit according to claim 2, characterized in that: A telescopic joint (44) is fixedly mounted on the inner wall of the mixing chamber (4), a sphere (441) is fixed to the front end of the telescopic joint (44), the interior of the middle group of stirring shafts (42) are all hollow, and a push-pull plate (421) is slidably connected to the inner wall, a push-pull rod (422) is fixed to one side of the push-pull plate (421), and the outer end of the push-pull rod (422) is spherical and contacts the sphere (441) after rotation; An elastic spring (423) is fixed between the outer side of the push-pull plate (421) and the inner wall of the stirring shaft (42), and the elastic spring (423) is sleeved on the outer side of the push-pull rod (422). An air blowing cavity (71) is fixed above the weighing plate (7), the interior of the air blowing cavity (71) is hollow, and a plurality of air blowing holes are provided around it. A hole (412) is provided inside the rotating shaft (41), and two ends of the hole (412) are respectively connected to the interior of the stirring shaft (42) and the interior of the air blowing cavity (71).

4. A weighing type mixing and metering unit according to claim 3, characterized in that: A hydraulic chamber (45) is fixed to the inner wall of the mixing chamber (4), a hydraulic plate (451) is slidably connected to the inner wall of the hydraulic chamber (45), a threaded rod (452) is fixed to one side of the hydraulic plate (451), a threaded hole is provided on the left side of the hydraulic chamber (45), the threaded rod (452) is threadedly connected to the threaded hole, a plug-in rod (453) is fixed to the outer end, and a limit block is provided on the outer side of the plug-in rod (453), a rotating tooth (46) is meshed on the upper right side of the toothed disc (411), a sleeve (461) is fixed to the right end of the rotating tooth (46), a plug-in hole is provided inside the sleeve (461), and a notch is provided on the inner side of the plug-in hole, the plug-in rod (453) is plugged into the notch of the plug-in hole through the limit block, and is thus clamped in the sleeve (461); Hydraulic oil is provided on the right side of the hydraulic plate (451), and a liquid inlet pipe and a liquid extraction pipe are connected to the expansion joint (44) on the right side, and pressure valves (47) are provided in both the liquid inlet pipe and the liquid extraction pipe.

5. A weighing type mixing and metering unit according to claim 4, characterized in that: Extrusion rods (413) are fixed on both the left and right sides of the rotating shaft (41), the extrusion rods (413) are located above the central stirring shaft (42), and the outer ends of the extrusion rods (413) are spherical, and the outer ends of the extrusion rods (413) are located inside the outer ends of the push-pull rods (422); The spherical body (441) moves forward, and the extruding rod (413) rotates to contact the spherical body (441); The middle of the rotating shaft (41) is in a disconnected shape, and a plug hole (48) is provided below the disconnected portion, a slot is provided inside the plug hole (48), an insertion rod (49) is provided above the disconnected portion, and a protrusion is provided on the outside of the insertion rod (49), and the insertion rod (49) is inserted into the slot of the plug hole (48) through the protrusion, and the two are mutually engaged.

6. A weighing type mixing and metering unit according to claim 5, characterized in that: A revolution control module is provided inside the motor (3), the revolution control module is electrically connected to the weight sensing module, and the revolution control module is used to control the number of clockwise and counterclockwise revolutions of the motor (3) according to the total weight of the masterbatch and different additives; The control method of the circle number control module is: , is the number of clockwise and counterclockwise rotations of the motor (3), is the maximum number of clockwise and counterclockwise rotations of the motor (3), is the total weight of masterbatch and different additives, is the maximum load-bearing capacity of the weighing plate (7).

7. A weighing type mixing and metering unit according to claim 6, characterized in that: The number of clockwise and counterclockwise rotations of the motor (3) is: = When the pressure valve (47) opens.

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