Feeding device of plastic extruder

Abstract

The feeding device comprises a tank body, a feeding port and a discharging channel, the size of an opening of the feeding port is smaller than that of the horizontal section of the tank body, two beating rods are arranged at the feeding port and rotationally connected with the feeding port, one beating rod is in transmission connection with a first motor, and the other beating rod is in transmission connection with a second motor. The two beating rods are rotationally connected through a gear; a filter screen and an extrusion assembly arranged above the filter screen are arranged in the middle in the tank body, the extrusion assembly comprises a rotating rod penetrating through the middle of the filter screen, a power device for driving the rotating rod to rotate is arranged at the bottom of the rotating rod, and a plurality of rolling shafts attached to the filter screen are arranged on the rotating rod; a drying device is arranged on the side wall of the tank body; and a quantitative blanking device is arranged at the discharge channel. According to the utility model, caked raw material particles are dispersed into single particles, and then the raw material particles are filtered, so that the raw material particles are uniformly dispersed, and the raw material particles entering the extruder are prevented from being adhered to influence the injection molding effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of plastics production, especially to a plastic extruder feeding device. BACKGROUND

[0002] The plastic extruder is the most important production machine in the production of plastic products, with the development of science and technology, more and more production machines develop towards mechatronics, and the intelligentization and modularization of the plastic extruder have also been greatly developed. When processing and producing plastics, first, the raw materials are put into the inside of the hopper, and then conveyed from the inside of the hopper to the next processing procedure for production. For the production of plastic products such as mulch film, different characteristic raw material particles must be mixed and processed to ensure that various materials are fully mixed and homogeneous. However, when discharging, the raw material particles are mutually adhered due to the water vapor attached to the surface of the raw material particles, resulting in clumping. The clumped raw material particles will cause uneven mixing of raw material particles with different characteristics, and incomplete melting, thereby affecting the injection molding quality. SUMMARY

[0003] In view of the above problems, the utility model provides a plastic extruder feeding device, which disperses the clumped raw material particles, and then filters the raw material particles to make the raw material particles uniformly dispersed, avoiding the adhesion of the raw material particles entering the extruder, and affecting the injection molding effect.

[0004] The technical scheme of the utility model is as follows:

[0005] A plastic extruder feeding device, comprising a tank body, a feed inlet and a discharge channel, the opening size of the feed inlet is smaller than the size of the horizontal cross section of the tank body, two horizontal parallel beating rods are arranged at the feed inlet, one of the beating rods is rotationally connected with the feed inlet, one of the beating rods is rotationally connected with a motor, and the two beating rods are rotationally connected through a gear;

[0006] A filter screen and an extrusion assembly arranged above the filter screen are arranged in the middle of the tank body, the extrusion assembly comprises a rotating rod penetrating through the middle of the filter screen, the bottom of the rotating rod is provided with a power device for driving the rotation of the rotating rod, and a plurality of rollers are arranged on the rotating rod and abut against the filter screen;

[0007] The side wall of the tank body is provided with a drying device;

[0008] A quantitative discharging device is arranged at the discharge channel.

[0009] The working principle of the above technical scheme is as follows:

[0010] The utility model discloses a kind of plastic extruders feeding device, raw material particles are poured from feed inlet, pre-treatment is scattered to raw material particles by beating rod, and raw material after scattering falls on filter screen, and the particle size is less than the mesh size of filter screen, and it can directly fall below filter screen, the raw material particles of larger lump that are not completely scattered by dispersion device, are driven to rotate by rotating rod, and cooperate with the mesh of filter screen, to be further dispersed into single particle, drying device is carried out drying to raw material during the movement of raw material in tank body, reduce the moisture content of raw material, improve injection molding quality, and the weight of raw material after crushing and rolling is controlled by quantitative feeding device to enter extruder, guarantee the effect of extrusion molding.

[0011] The utility model discloses a kind of plastic extruders feeding device, raw material particles are poured from feed inlet, pre-treatment is scattered to raw material particles by beating rod, and raw material after scattering falls on filter screen, and the particle size is less than the mesh size of filter screen, and it can directly fall below filter screen, the raw material particles of larger lump that are not completely scattered by dispersion device, are driven to rotate by rotating rod, and cooperate with the mesh of filter screen, to be further dispersed into single particle, drying device is carried out drying to raw material during the movement of raw material in tank body, reduce the moisture content of raw material, improve injection molding quality, and the weight of raw material after crushing and rolling is controlled by quantitative feeding device to enter extruder, guarantee the effect of extrusion molding.

[0012] In further technical solutions, the power device includes motor two arranged on one side of the tank body, the output end of the motor two is drivingly connected with a rotating shaft penetrating into the tank body, the end of the rotating shaft is provided with a driving bevel gear, the bottom end of the rotating rod is provided with a driven bevel gear meshing with the driving bevel gear, and the motor two drives the rotating shaft to rotate, and then drives the rotating rod drivingly connected on the rotating shaft to rotate.

[0013] In further technical solutions, the driving bevel gear and the driven bevel gear are provided with a fixed box at the meshing position, which fixes the meshing of the driving bevel gear and the driven bevel gear, and avoids the influence of the raw material particles on the rotation of the driving bevel gear and the driven bevel gear.

[0014] In a further technical solution, the quantitative discharging device comprises a sealing plate, a rotating rod and a pressing rod, the rotating rod is embedded on the inner wall of the discharging channel and is rotationally connected with the inner wall of the discharging channel, the sealing plate and the pressing rod are arranged on the two sides of the rotating rod and are fixedly connected with the rotating rod, the sealing plate and the pressing rod are located on the same horizontal plane, a protruding block is arranged on the side of the pressing rod away from the rotating rod, a fan-shaped variable-diameter wheel is arranged on the rotating shaft, the vertical section of the fan-shaped variable-diameter wheel is composed of a fixed-radius fan-shaped surface, an arc-shaped surface with gradually decreasing radius and an arc-shaped surface with gradually increasing radius in sequence, and the connecting portions between the surfaces are smoothly connected, the fan-shaped variable-diameter wheel is always in abutment with the protruding block, the weight of the sealing plate is greater than or equal to the sum of the weights of the protruding block and the pressing rod, the opening and closing of the sealing plate are controlled through the fan-shaped variable-diameter wheel, when the side edge of the fixed-radius fan-shaped surface of the fan-shaped variable-diameter wheel is in abutment with the protruding block, the pressing rod moves downward, thereby driving the sealing plate to rotate upward around the rotating rod to the state that the side edges of the sealing plate are in abutment with the inner wall of the discharging channel, the closing of the sealing plate is realized, when the side edges of the arc-shaped surface with gradually decreasing radius and the arc-shaped surface with gradually increasing radius of the fan-shaped variable-diameter wheel are in abutment with the protruding block, the sealing plate rotates downward around the rotating rod under the gravity of the raw material particles and the sealing plate itself, the automatic opening of the sealing plate is realized, and the weight control of the raw material discharging is realized.

[0015] In a further technical solution, the roller is provided with a toothed nail, which improves the dispersion effect and can vibrate the filter screen to make small particles of raw materials fall off.

[0016] In a further technical solution, the side wall of the tank body is provided with an air outlet hole, water vapor is discharged from the air outlet hole, and the dispersed raw material particles are prevented from being adhered again in the tank body.

[0017] The utility model discloses the beneficial effect is:

[0018] 1、 the utility model discloses a caked raw material particle is separated between particles through dispersion device and extrusion assembly, then the raw material particle is filtered with filter screen, so that the raw material particle is more evenly dispersed, the mixing uniformity of different plastic raw material particles during extrusion is improved, the raw material particle is dried through drying device, the quantitative discharging device controls the weight of the raw material after crushing and rolling that enters the extruder, ensures that the raw material particle is evenly heated and is more easily melted, and ensures the effect and quality of extrusion molding.

[0019] 2. The opening and closing of the sealing plate is controlled by the sector-shaped variable diameter wheel. When the side of the fixed radius sector-shaped surface on the sector-shaped variable diameter wheel abuts against the protrusion, the pressing rod moves downward, thereby driving the sealing plate to rotate upward around the rotating rod until the sides of the sealing plate are in contact with the inner wall of the discharge channel, thus closing the sealing plate. When the side of the arc-shaped surface with the radius decreasing from large to small and the arc-shaped surface with the radius increasing from small to large on the sector-shaped variable diameter wheel abuts against the protrusion, the sealing plate, which is carrying the raw material, rotates downward around the rotating rod under the weight of the raw material and the sealing plate itself, thus automatically opening the sealing plate and controlling the weight of the raw material being discharged. Attached Figure Description

[0020] Figure 1 This is a cross-sectional structural schematic diagram of the feeding device for a plastic extruder according to an embodiment of the present invention;

[0021] Figure 2 yes Figure 1 A top-view structural diagram;

[0022] Figure 3 This is a schematic diagram of the connection structure between the driving bevel gear and the driven bevel gear.

[0023] Figure 4 This is a schematic diagram of the connection structure of the pressing rod, the protrusion, and the sector-shaped variable diameter wheel.

[0024] Explanation of reference numerals in the attached figures:

[0025] 10. Tank body; 20. Feed inlet; 21. Beating rod; 22. Motor 1; 30. Filter screen; 31. Rotating rod; 32. Roller; 40. Motor 2; 41. Rotating shaft; 42. Driving bevel gear; 43. Driven bevel gear; 44. Fixed box; 50. Discharge channel; 51. Sealing plate; 52. Rotating rod; 53. Pressing rod; 54. Protrusion; 55. Sector-shaped variable diameter wheel. Detailed Implementation

[0026] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0027] Example:

[0028] A feeding device for a plastic extruder, such as Figure 1 and Figure 2As shown, including the tank body 10, feed inlet 20 and discharge channel 50, the size of the opening of the feed inlet 20 is less than the size of the horizontal section of the tank body 10, the feed inlet 20 is provided with two horizontal parallel beating rods 21, two beating rods 21 are rotatably connected with the feed inlet 20, one of the beating rods 21 is drivingly connected with the motor 22, and the two beating rods 21 are rotatably connected through a gear; the middle part of the tank body 10 is provided with a filter screen 30 and an extrusion assembly arranged above the filter screen 30, the extrusion assembly comprises a rotating rod 31 penetrating through the middle part of the filter screen 30, the bottom of the rotating rod 31 is provided with a power device for driving the rotating rod 31 to rotate, and a plurality of rollers 32 are arranged on the rotating rod 31 and are in close contact with the filter screen 30; the side wall of the tank body 10 is provided with a drying device; the discharge channel 50 is provided with a quantitative discharging device.

[0029] The feeding device of the plastic extruder is used, raw material particles are poured into the feed inlet 20, the beating rod 21 pre-treats and scatters the raw material particles, the scattered raw material particles fall onto the filter screen 30, the particles with a size smaller than the size of the mesh of the filter screen 30 can directly fall below the filter screen 30, the raw material particles with larger lumps that are not completely scattered by the scattering device are driven to rotate by the rotating rod 31 and the rollers 32, and are further scattered into single particles by cooperating with the mesh of the filter screen 30, the drying device dries the raw material during the movement of the raw material in the tank body 10, the water content of the raw material is reduced, the injection molding quality is improved, the quantitative discharging device controls the weight of the crushed and rolled raw material entering the extruder, and the effect of extrusion molding is ensured.

[0030] The raw material particles are separated by the scattering device and the extrusion assembly, and then the raw material particles are filtered by the filter screen 30, so that the raw material particles are more uniformly dispersed, the mixing uniformity of different plastic raw material particles during extrusion is improved, the raw material particles are dried by the drying device, the quantitative discharging device controls the weight of the crushed and rolled raw material entering the extruder, the raw material particles are uniformly heated and more easily melted, the effect and quality of extrusion molding are ensured.

[0031] In another embodiment, as shown in Figure 3 The power device comprises a motor two 40 arranged on one side of the tank body 10, the output end of the motor two 40 is drivingly connected with a rotating shaft 41 penetrating into the tank body 10, the end of the rotating shaft 41 is provided with a driving bevel gear 42, the bottom end of the rotating rod 31 is provided with a driven bevel gear 43 meshing with the driving bevel gear 42, the motor two 40 drives the rotating shaft 41 to rotate, and then drives the rotating rod 31 to rotate through the driving bevel gear 42 meshing with the driven bevel gear 43 drivingly connected on the rotating shaft 41.

[0032] In another embodiment, a fixing box 44 is provided at the meshing point of the driving bevel gear 42 and the driven bevel gear 43, which not only fixes the meshing of the driving bevel gear 42 and the driven bevel gear 43, but also avoids the influence of raw material particles on the rotation of the driving bevel gear 42 and the driven bevel gear 43.

[0033] In another embodiment, such as Figure 1 and Figure 4 As shown, the quantitative feeding device includes a sealing plate 51, a rotating rod 52, and a pressing rod 53. The rotating rod 52 is embedded in the inner wall of the discharge channel 50 and is rotatably connected to the inner wall of the discharge channel 50. The sealing plate 51 and the pressing rod 53 are located on both sides of the rotating rod 52 and are fixedly connected to the rotating rod 52. The sealing plate 51 and the pressing rod 53 are located on the same horizontal plane. A protrusion 54 is provided on the side of the pressing rod 53 away from the rotating rod 52. A sector-shaped variable diameter wheel 55 is provided on the rotating shaft 41. The vertical cross-section of the sector-shaped variable diameter wheel 55 is composed of a sector-shaped surface with a fixed radius, an arc-shaped surface with a radius decreasing from large to small, and an arc-shaped surface with a radius increasing from small to large in sequence, and the connection between them is smoothly rounded. The sector-shaped variable diameter wheel 55 always abuts against the protrusion 54. The weight of the sealing plate 51 is greater than or equal to that of the protrusion 54. The combined weight of the pressing rod 53 and the fan-shaped variable diameter wheel 55 controls the opening and closing of the sealing plate 51. When the side of the fixed radius fan-shaped surface on the fan-shaped variable diameter wheel 55 abuts against the protrusion 54, the pressing rod 53 moves downward, thereby driving the sealing plate 51 to rotate upward around the rotating rod 52 until each side of the sealing plate 51 is in contact with the inner wall of the discharge channel 50, thus closing the sealing plate 51. When the side of the arc-shaped surface with a decreasing radius and the arc-shaped surface with a decreasing radius on the fan-shaped variable diameter wheel 55 abuts against the protrusion 54, since the sealing plate 51 carries the raw material particles, under the weight of the raw material particles and the sealing plate 51 itself, the sealing plate 51 rotates downward around the rotating rod 52, thus automatically opening the sealing plate 51, thereby controlling the weight of the raw material discharge.

[0034] In another embodiment, the roller 32 is provided with toothed pins to improve the dispersion effect and to vibrate the filter screen 30, causing small particles of raw material to fall off.

[0035] In another embodiment, the upper side wall of the tank 10 is provided with an air vent, through which water vapor drifts out, preventing the dispersed raw material particles from sticking together again due to water vapor inside the tank 10.

[0036] The embodiments described above merely illustrate specific implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A feeding device for a plastic extruder, comprising a tank, a feed inlet, and a discharge channel, characterized in that, The opening size of the feed inlet is smaller than the size of the horizontal cross section of the tank. Two horizontally parallel beaters are provided at the feed inlet. The two beaters are rotatably connected to the feed inlet. One of the beaters is driven by a motor, and the two beaters are rotatably connected by gears. The tank body is provided with a filter screen in the middle and an extrusion assembly above the filter screen. The extrusion assembly includes a rotating rod that passes through the middle of the filter screen. The bottom of the rotating rod is provided with a power device to drive its rotation. The rotating rod is provided with multiple rollers that fit against the filter screen. The tank body is equipped with a drying device on its side wall; The discharge channel is equipped with a quantitative feeding device.

2. The feeding device for a plastic extruder according to claim 1, characterized in that, The power unit includes a second motor located on one side of the tank. The output end of the second motor is connected to a rotating shaft that extends through the tank. The end of the rotating shaft is provided with a driving bevel gear, and the bottom end of the rotating rod is provided with a driven bevel gear that meshes with the driving bevel gear.

3. The feeding device for a plastic extruder according to claim 2, characterized in that, A fixed box is provided at the meshing point of the driving bevel gear and the driven bevel gear.

4. The feeding device for a plastic extruder according to claim 2, characterized in that, The quantitative feeding device includes a sealing plate, a rotating rod, and a pressing rod. The rotating rod is embedded in the inner wall of the discharge channel and is rotatably connected to the inner wall of the discharge channel. The sealing plate and the pressing rod are located on both sides of the rotating rod and are fixedly connected to the rotating rod. The sealing plate and the pressing rod are located on the same horizontal plane. A protrusion is provided on the side of the pressing rod away from the rotating rod. A fan-shaped variable diameter wheel is provided on the rotating shaft. The vertical cross-section of the fan-shaped variable diameter wheel is composed of a fan-shaped surface with a fixed radius, an arc-shaped surface with a radius decreasing from large to small, and an arc-shaped surface with a radius increasing from small to large in sequence, and the connection between them is smoothly rounded. The fan-shaped variable diameter wheel always abuts against the protrusion. The weight of the sealing plate is greater than or equal to the sum of the weights of the protrusion and the pressing rod.

5. The feeding device for a plastic extruder according to claim 1, characterized in that, The roller is equipped with toothed pins.

6. The feeding device for a plastic extruder according to claim 1, characterized in that, The upper side wall of the tank is provided with an air vent.

Images