Feeding mechanism of plastic extruder

Abstract

The utility model relates to the technical field of feeding of plastic extruders, in particular to a feeding mechanism of a plastic extruder, which comprises a feeding box, an air blowing mechanism for drying plastic raw material particles is arranged in an inner cavity of the feeding box, and an accelerating mechanism for accelerating non-caked plastic raw material particles to enter the feeding box is arranged in the inner cavity of the feeding box. The acceleration mechanism comprises an eccentric wheel rotationally connected to an inner cavity of the feeding box, a first screening plate is vertically, elastically and slidably connected into a feeding hopper on the feeding box, and a first T-shaped plate abutting against the eccentric wheel is fixedly installed at the bottom end of the first screening plate. According to the plastic raw material particle screening device, caked and non-caked plastic raw material particles on the first screening plate can be conveniently driven to synchronously move through movement of the first screening plate, the non-caked plastic raw material particles can be conveniently accelerated to enter the feeding box through movement of the plastic raw material particles, and part of the caked plastic raw material particles can be conveniently shaken to be broken; and therefore, the time of workers is saved, and waste of plastic raw material particles is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic extruder feeding, in particular to a plastic extruder feeding mechanism. Background Art

[0002] Existing plastic extruders generally include a driving motor, a reduction gearbox and a machine body. A feed rod and a feed screw connected to the reduction gearbox are provided on the machine body. The reduction gearbox includes a shell and a transmission mechanism arranged on the shell and composed of a plurality of synchronous wheels. The transmission mechanism is connected to the feed rod and the feed screw respectively, thereby driving the feed rod and the feed screw to rotate synchronously.

[0003] The utility model patent with announcement number CN218948156U and name of TPE extruder plastic particle feeding mechanism includes a box body, a feed port, a screening net, multiple fans, a stirring mechanism, a discharge barrel, a door panel, an electric telescopic rod, and a fixed rod; the upper end of the box body is fixedly connected with the feed port; the screening net is installed between the box body and the feed port; the discharge barrel is installed in the center of the box body; the door panel just blocks the opening at the lower end of the discharge barrel; the upper end of the electric telescopic rod is fixedly connected to the door panel, and the lower end of the electric telescopic rod is fixedly connected to the fixed rod; the other end of the fixed rod is fixedly connected to the inner wall of the box body; the stirring mechanism is installed inside the box body, above the discharge barrel, for stirring the plastic particles in the box body above the discharge barrel; multiple fans are fixedly installed on the inner wall of the box body above the discharge barrel, and their directions are all aimed at the stirring mechanism; the stirring mechanism includes a stirring shaft, a driving mechanism, and multiple stirring rods; the utility model can first blow dry the raw material particles and then inject them into the injection molding machine to prevent wet raw material particles from affecting the output quality of the product.

[0004] The equipment of this patent can blow dry the raw material particles before feeding them into the injection molding machine, thereby preventing the wet raw material particles from affecting the output quality of the product; however, the equipment of this patent needs to make the plastic raw material particles pass through the screening net in the discharge barrel when feeding them into the discharge barrel, and the plastic raw material particles that meet the specifications can directly enter the inner cavity of the discharge barrel. In order to avoid subsequent blockage, the agglomerated plastic raw material particles need to be manually removed. Manually removing the agglomerated plastic raw material particles not only wastes the staff's time but also easily causes waste of plastic raw material particles, thereby bringing certain inconveniences to the staff's use. Utility Model Content

[0005] The utility model aims to provide a feeding mechanism for a plastic extruder.

[0006] The technical problem solved by the utility model is that the existing equipment is inconvenient to process agglomerated plastic raw material particles.

[0007] The utility model can be implemented through the following technical scheme: a feeding mechanism of a plastic extruder comprises a feeding box, the inner cavity of the feeding box is provided with a wind blowing mechanism for drying plastic raw material particles, the inner cavity of the feeding box is provided with an accelerating mechanism for accelerating unagglomerated plastic raw material particles to enter the feeding box, the accelerating mechanism comprises an eccentric wheel rotatably connected to the inner cavity of the feeding box, a first screening plate is vertically elastically slidably connected in a feeding funnel on the feeding box, a first T-shaped plate abutting against the eccentric wheel is fixedly installed at the bottom end of the first screening plate, a second screening plate is vertically elastically slidably connected in a discharge pipe at the bottom end of the feeding box, and a second T-shaped plate abutting against the eccentric wheel is fixedly installed on the second screening plate.

[0008] A further technical improvement of the utility model is that a stirring rod group coaxially arranged with the eccentric wheel is fixedly installed in the inner cavity of the feeding box.

[0009] A further technical improvement of the utility model is that the diameter of the screening holes in the first screening plate is greater than the diameter of the screening holes in the second screening plate.

[0010] A further technical improvement of the utility model is that a quantitative discharging mechanism is provided at the bottom end of the feeding box, and the quantitative discharging mechanism includes a connecting box fixedly connected to the bottom end of the feeding box, and a discharging opening corresponding to the discharging pipe is opened through the center of the bottom end of the connecting box, and the inner cavity of the discharging opening is vertically slidably connected with a receiving plate, and a gravity sensor is fixedly installed on the receiving plate, and an electric telescopic rod is fixedly installed on the side wall of the connecting box, and the electric telescopic rod is fixedly connected to the receiving plate, and an alarm electrically connected to the gravity sensor is fixedly installed on the side wall of the connecting box.

[0011] A further technical improvement of the utility model is that the wind blowing mechanism comprises four fans which are respectively fixed on both sides of the top end and the bottom end of the inner cavity of the loading box.

[0012] A further technical improvement of the utility model is that a protective filter screen plate corresponding to the fan is fixedly installed in the inner cavity of the loading box, and the setting of the protective filter screen plate prevents the fan from being damaged when the equipment stirs the plastic raw material particles.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. The utility model drives the stirring rod group to rotate synchronously through the rotation of the stirring shaft, and the stirring rod group is convenient for reciprocating stirring of the plastic raw material particles, which is conducive to increasing the cooling area thereof; the eccentric wheel is driven to rotate while the stirring shaft rotates, and the first T-shaped plate and the second T-shaped plate are driven to perform asynchronous reciprocating vertical motion through the rotation of the eccentric wheel, that is, when the first T-shaped plate moves upward, the second T-shaped plate moves downward, and when the first T-shaped plate moves downward, the second T-shaped plate moves upward, and the first screening plate and the second screening plate are driven to move synchronously through the movement of the first T-shaped plate and the second T-shaped plate, and the movement of the first screening plate is convenient for driving the agglomerated and unagglomerated plastic raw material particles thereon to move synchronously, and the movement of the plastic raw material particles is convenient for not only accelerating the unagglomerated plastic raw material particles to enter the feeding box but also for shaking off partially agglomerated plastic raw material particles, which is convenient for not only saving the time of the staff but also reducing the waste of plastic raw material particles, and the movement of the second screening plate is convenient for screening the cooled plastic raw material particles, which is convenient for ensuring the quality of the cooled plastic raw material particles and convenient for use.

[0015] 2. The utility model screened plastic raw material particles enter the receiving funnel, and the weight of the screened plastic raw material particles is measured by the gravity sensor on the receiving plate. When the weight is met, the staff will be reminded through the alarm, and the staff will be prevented from feeding materials into the upper material box again by reminding the staff. After receiving the reminder, the staff can discharge the screened plastic raw material particles into the injection molding machine through the electric telescopic rod, thereby making the equipment more convenient for the staff to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 For this utility model Figure 1 A partial enlarged view of the middle A;

[0019] Figure 3 This is a structural sectional view of the feeding box of the utility model;

[0020] Figure 4 This is a structural sectional view of the support box of the utility model.

[0021] In the figure:

[0022] 1. Loading box;

[0023] 2. stirring shaft; 21. stirring rod group; 22. fan; 23. protective filter screen; 24. support box; 241. eccentric wheel; 242. first T-shaped plate; 243. first screening plate; 244. second T-shaped plate; 245. second screening plate;

[0024] 3. Feed funnel;

[0025] 4. Discharge pipe;

[0026] 5. Connection box; 51. Material receiving funnel; 52. Discharge port; 53. Receiver plate; 54. Gravity sensor; 55. Electric telescopic rod; 56. Fixed plate; 57. Alarm. DETAILED DESCRIPTION

[0027] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0028] See also Figure 1-4 As shown, this embodiment provides a technical solution, the feeding mechanism of the plastic extruder includes a feeding box 1, a feeding funnel 3 is fixedly installed on the feeding box 1, and a discharge pipe 4 is fixedly installed at the bottom end of the feeding box 1.

[0029] The inner cavity of the feeding box 1 is provided with a wind blowing mechanism for drying the plastic raw material particles. The wind blowing mechanism includes four fans 22 respectively fixed on both sides of the top and bottom ends of the inner cavity of the feeding box 1. The inner cavity of the feeding box 1 is fixedly installed with protective filter screen plates 23 corresponding to the fans 22 one by one.

[0030] The inner cavity of the feeding box 1 is provided with an accelerating mechanism for accelerating the drying of the plastic raw material particles. The accelerating mechanism includes a stirring shaft 2 rotatably connected between the two inner side walls of the feeding box 1. A servo motor driving the stirring shaft 2 to rotate is fixedly installed on the side wall of the feeding box 1. An eccentric wheel 241 is fixedly installed at the center of the outer peripheral wall of the stirring shaft 2. A support box 24 is fixedly installed at the center of the inner cavity of the feeding box 1 through a support rod. The stirring shaft 2 is rotatably connected to the support box 24. The top of the support box 24 is vertically elastically slidably connected with a first T-shaped Plate 242, the first T-shaped plate 242 is in contact with the eccentric wheel 241, a first screening plate 243 is slidably connected between the two inner side walls of the loading box 1, the first screening plate 243 is fixedly connected to the first T-shaped plate 242, the bottom end of the support box 24 passes through a vertical elastic sliding connection with a second T-shaped plate 244, the second T-shaped plate 244 is in contact with the eccentric wheel 241, a second screening plate 245 is slidably connected between the two inner side walls of the discharge pipe 4, the second screening plate 245 is fixedly connected to the second T-shaped plate 244;

[0031] The diameter of the sieve holes in the first sieve plate 243 is greater than the diameter of the sieve holes in the second sieve plate 245;

[0032] A stirring rod assembly 21 is fixedly mounted on the outer peripheral wall of the stirring shaft 2 and on both sides of the eccentric wheel 241 .

[0033] A quantitative discharging mechanism is provided at the bottom end of the loading box 1, and the quantitative discharging mechanism includes a connecting box 5 fixedly connected to the bottom end of the loading box 1, a discharging port 52 corresponding to the discharging pipe 4 is provided through the center of the bottom end of the connecting box 5, a receiving plate 53 is vertically slidably connected to the inner cavity of the discharging port 52, a gravity sensor 54 is fixedly installed on the receiving plate 53, an electric telescopic rod 55 is fixedly installed on the side wall of the connecting box 5, a fixing plate 56 fixedly connected to the receiving plate 53 is fixedly installed on the output end of the electric telescopic rod 55, and the gravity sensor 54 is electrically connected to the alarm 57 on the side wall of the connecting box 5;

[0034] A material receiving funnel 51 corresponding to the material discharge opening 52 is fixedly mounted on the bottom end of the inner wall of the connection box 5 .

[0035] When the utility model is in use, the plastic raw material particles to be loaded are placed in the loading box 1, and the plastic raw material particles fall onto the first screening plate 243 by gravity. At this time, the power of the servo motor and the fan 22 are turned on at the same time. The fan 22 is driven to cool the plastic raw material particles that meet the specifications. The servo motor is driven to rotate the stirring shaft 2. The rotation of the stirring shaft 2 can drive the stirring rod group 21 to rotate synchronously. The stirring rod group 21 can be used to stir the plastic raw material particles back and forth, which is beneficial to increase the cooling area thereof.

[0036] When the stirring shaft 2 rotates, the eccentric wheel 241 is driven to rotate. The rotation of the eccentric wheel 241 drives the first T-shaped plate 242 and the second T-shaped plate 244 to perform asynchronous reciprocating vertical motion, that is, when the first T-shaped plate 242 moves upward, the second T-shaped plate 244 moves downward, and when the first T-shaped plate 242 moves downward, the second T-shaped plate 244 moves upward. The movement of the first T-shaped plate 242 and the second T-shaped plate 244 drives the first screening plate 243 and the second screening plate 245 to move synchronously. The movement of the first screening plate 243 facilitates the synchronous movement of the agglomerated and unagglomerated plastic raw material particles thereon. The movement of the plastic raw material particles not only facilitates the acceleration of the unagglomerated plastic raw material particles entering the loading box 1, but also facilitates The partially agglomerated plastic raw material particles are broken into pieces, which not only saves the staff's time but also helps to reduce the waste of plastic raw material particles. The movement of the second screening plate 245 facilitates the screening of the cooled plastic raw material particles, thereby ensuring the quality of the cooled plastic raw material particles. The screened plastic raw material particles enter the receiving funnel 51, and the gravity sensor 54 on the receiving plate 53 facilitates the weight measurement of the screened plastic raw material particles. When the weight meets the requirements, the alarm 57 will be used to remind the staff, so as to prevent the staff from feeding materials into the upper material box 1 again. After receiving the reminder, the staff can discharge the screened plastic raw material particles into the injection molding machine through the electric telescopic rod 55.

[0037] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A feeding mechanism for a plastic extruder, comprising a feeding box (1), wherein the inner cavity of the feeding box (1) is provided with a wind blowing mechanism for drying plastic raw material particles, characterized in that: The inner cavity of the feeding box (1) is provided with an acceleration mechanism for accelerating the unagglomerated plastic raw material particles to enter the feeding box (1), the acceleration mechanism comprising an eccentric wheel (241) rotatably connected to the inner cavity of the feeding box (1), a first screening plate (243) vertically elastically slidably connected in the feeding funnel (3) on the feeding box (1), a first T-shaped plate (242) abutting against the eccentric wheel (241) fixedly mounted at the bottom end of the first screening plate (243), a second screening plate (245) vertically elastically slidably connected in the discharge pipe (4) at the bottom end of the feeding box (1), a second T-shaped plate (244) abutting against the eccentric wheel (241) fixedly mounted on the second screening plate (245).

2. The feeding mechanism of the plastic extruder according to claim 1, characterized in that: The inner cavity of the loading box (1) is fixedly mounted with a stirring rod group (21) coaxially arranged with the eccentric wheel (241).

3. The feeding mechanism of the plastic extruder according to claim 1, characterized in that: The diameter of the sieve holes in the first sieve plate (243) is greater than the diameter of the sieve holes in the second sieve plate (245).

4. The feeding mechanism of the plastic extruder according to claim 1, characterized in that: A quantitative discharging mechanism is provided at the bottom end of the loading box (1), and the quantitative discharging mechanism comprises a connecting box (5) fixedly connected to the bottom end of the loading box (1); a discharging opening (52) corresponding to the discharging pipe (4) is provided through the center of the bottom end of the connecting box (5); a receiving plate (53) is vertically slidably connected to the inner cavity of the discharging opening (52); a gravity sensor (54) is fixedly mounted on the receiving plate (53); an electric telescopic rod (55) is fixedly mounted on the side wall of the connecting box (5); the electric telescopic rod (55) is fixedly connected to the receiving plate (53); and an alarm (57) electrically connected to the gravity sensor (54) is fixedly mounted on the side wall of the connecting box (5).

5. The feeding mechanism of the plastic extruder according to claim 1, characterized in that: The wind blowing mechanism comprises four fans (22) respectively fixed on both sides of the top end and the bottom end of the inner cavity of the loading box (1).

6. The feeding mechanism of the plastic extruder according to claim 5, characterized in that: The inner cavity of the loading box (1) is fixedly provided with a protective filter screen plate (23) corresponding one to one with the fan (22).

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