Feeding mechanism of plastic part injection molding machine

Abstract

The utility model discloses a feeding mechanism of a plastic part injection molding machine, and relates to the field of feeding mechanisms of injection molding machines, the feeding mechanism of the plastic part injection molding machine comprises a conical hopper, the top surface of the conical hopper is rotatably connected with a charging barrel through a hinge, and the feeding mechanism also comprises a scraper arranged in an inner cavity of the charging barrel; according to the feeding mechanism of the plastic part injection molding machine, through the arrangement of the scraping plate, the rotating rod, the motor and other structures, plastic particles attached to the inner wall of the charging barrel can be automatically scraped off by the whole feeding mechanism before the plastic particles with different colors are replaced, so that manual stripping and cleaning are not needed when the colors of the plastic particles are changed, and the working efficiency is improved. The plastic particle drying device is more convenient to use, more manpower is saved, due to the arrangement of a scraper and a connecting piece, the motor can be intermittently started to stir plastic particles in the daily operation process, and adhesion and hardening are further prevented in cooperation with drying.

Description

Technical Field

[0001] This utility model relates to the field of feeding mechanisms for injection molding machines, and in particular to a feeding mechanism for a plastic injection molding machine. Background Technology

[0002] The feed end of the injection molding machine is connected to the hopper, and the top cover of the hopper is connected to the discharge end of the material pump. The material pump pumps plastic granules into the hopper. The hopper is composed of three parts: a conical hopper, a barrel, and a heating mechanism. The conical hopper is a cone-shaped funnel structure connected to the feed end of the injection molding machine. The barrel is hinged to the top surface of the conical hopper. The air outlet of the heating mechanism is connected to the conical hopper. In this way, the material is heated by the hot air of the heating mechanism in the barrel, which prevents the material from becoming damp.

[0003] The hinged connection between the barrel and the cone hopper is designed to facilitate opening the entire hopper when changing to different colored plastic granules, allowing for the cleaning of the plastic granules adhering to the inner wall and ensuring the purity of the color of the extruded plastic parts after color change. However, in actual operation, even after the barrel is opened, it is still necessary to manually sweep the inner wall of the barrel with a broom or similar tool to force the plastic granules adhering to the inner wall to separate from it. This entire operation requires the operator to stand on the injection molding machine, which often lacks a flat position for workers to stand on. Therefore, the operator must maintain an awkward and dangerous posture during the operation. Consequently, this manual removal of plastic granules is extremely inconvenient, dangerous, and difficult to perform. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, the purpose of this utility model is to provide a feeding mechanism for a plastic injection molding machine that solves the problem of manually sweeping the inner wall of the barrel to peel off the plastic particles attached to the inner wall in traditional technology, and achieves the effect of automatically peeling off the plastic particles attached to the inner wall of the barrel.

[0005] To address the problems in the existing technology, the technical solution of this utility model is as follows:

[0006] A feeding mechanism for a plastic injection molding machine includes a conical hopper, the top surface of which is rotatably connected to a material cylinder via a hinge, and a scraper disposed in the inner cavity of the material cylinder. The length direction of the scraper is the same as the axial direction of the material cylinder, and one longitudinal outer wall of the scraper contacts the inner wall of the material cylinder.

[0007] A rotating assembly is installed at the center of the material cylinder to drive the scraper to rotate around the axis of the material cylinder, and a vibration assembly is also installed on the top surface of the material cylinder to generate vibration on the top surface of the material cylinder.

[0008] Preferably, the rotating assembly includes a rotating rod rotatably connected to the center of the material cylinder via a bearing, the scraper is fixed to the outer wall of the rotating rod, the upper end of the rotating rod extends through the material cylinder to the top of the material cylinder, a frame is fixed to the top surface of the material cylinder, a motor is fixed to the top surface of the frame, and the top surface of the rotating rod is fixed to the output end of the motor.

[0009] Preferably, the motor is a geared motor.

[0010] Preferably, two sleeves are symmetrically fixed to the outer wall of the rotating rod, and connecting pieces are fixed to the outer wall of the sleeves. The ends of the two connecting pieces away from the sleeves are fixed to the outer wall of the scraper.

[0011] Preferably, the top surface of the platform has gaps formed at equal intervals.

[0012] Preferably, the vibration assembly includes a horizontal bar fixed to the upper end of the rotating rod, the horizontal bar being located above the material cylinder, and a striking column slidably inserted into the end of the horizontal bar away from the rotating rod through a sliding hole. A spring is sleeved on the upper end of the striking column, the upper end of the spring is fixed to the outer wall of the striking column, and the lower end of the spring is fixed to the top surface of the horizontal bar. The bottom of the striking column is hemispherical, and the top surface of the material cylinder has several inclined protrusions at equal angular intervals centered on the center of the top surface of the material cylinder. The striking column cooperates with the inclined protrusions.

[0013] Compared with the prior art, the advantages of this utility model are as follows:

[0014] 1. This utility model, through the design of scrapers, rotating rods, and motors, enables the entire feeding structure to automatically scrape off the plastic particles adhering to the inner wall of the feed cylinder before changing to different colors of plastic particles. Thus, when changing the color of plastic particles, there is no need for manual peeling and cleaning, making it more convenient to use and saving manpower. Furthermore, due to the design of scrapers and connecting plates, the motor can be intermittently turned on during daily operation to agitate the plastic particles, which, combined with drying, further prevents sticking and caking.

[0015] 2. This utility model, by setting up structures such as horizontal bars, striking columns, and springs, can generate vibration of the entire barrel when scraping off plastic particles attached to the inner wall of the barrel before color change. This vibration can further improve the separation of the attached particles from the inner wall of the barrel. At the same time, the vibration can also be transmitted to the scraper to ensure the separation of material particles from the scraper. The mechanical linkage setting reduces the investment in power equipment and lowers the cost of equipment manufacturing, operation and maintenance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a schematic diagram showing the relationship between the motor and the test stand of this utility model.

[0018] Figure 3 This utility model Figure 2 Enlarged view of point A.

[0019] Figure 4 This is a schematic diagram of the scraper of this utility model.

[0020] Reference numerals: 1. Conical hopper; 2. Material cylinder; 3. Scraper; 4. Rotating rod; 5. Sleeve; 6. Connecting plate; 7. Frame; 8. Motor; 9. Crossbar; 10. Striking column; 11. Spring; 12. Inclined protrusion. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Please see Figures 1 to 4 This embodiment provides a feeding mechanism for a plastic injection molding machine, including a cone hopper 1. The top surface of the cone hopper 1 is rotatably connected to a material cylinder 2 via a hinge. The top surface of the material cylinder 2 is connected to a feeding pipe and an air outlet pipe.

[0023] The feed pipe is connected to the discharge end of the material pump. The material pump pumps plastic granules through the feed pipe to the material cylinder 2 to achieve automatic feeding. The discharge port at the lower end of the cone hopper 1 is connected to the feed end of the injection molding machine. During operation, the material enters the injection molding machine from the lower end of the hopper. The plastic granules are dried in the cone hopper 1 and the material cylinder 2 by the heating mechanism installed on the outer wall of the cone hopper 1 to ensure the dryness of the plastic granules.

[0024] A scraper 3 is installed in the inner cavity of the material cylinder 2. The length direction of the scraper 3 is the same as the axis direction of the material cylinder 2. One longitudinal outer wall of the scraper 3 is in contact with the inner wall of the material cylinder 2. A rotating rod 4 is rotatably connected to the center of the material cylinder 2 through a bearing. Two sleeves 5 are symmetrically fixed to the outer wall of the rotating rod 4. Connecting pieces 6 are fixed to the outer wall of the sleeves 5. The ends of the two connecting pieces 6 away from the sleeves 5 are fixed to the outer wall of the scraper 3. The upper end of the rotating rod 4 extends through the material cylinder 2 to the top of the material cylinder 2. A frame 7 is fixed to the top surface of the material cylinder 2. The top surface of the frame 7 has gaps formed at equal intervals to reduce the weight of the frame 7. A motor 8 is fixed to the top surface of the frame 7. The output end of the motor 8 extends through the frame 7 to the bottom of the frame 7. The output end of the motor 8 is rotatably connected to the frame 7. The motor 8 is a geared motor. The top surface of the rotating rod 4 is fixed to the output end of the motor 8.

[0025] During daily injection molding, the drive motor 8 can be driven intermittently to drive the rotating rod 4 so that the scraper 3 rotates in the barrel 2, thereby agitating the plastic particles and preventing the plastic particles from caking in conjunction with the heating mechanism.

[0026] When the plastic granules are changed color, the motor 8 is driven to rotate, which drives the scraper 3 to scrape off the granules attached to the inner wall of the barrel 2.

[0027] A horizontal bar 9 is fixed to the upper end of the rotating rod 4. The horizontal bar 9 is located above the material cylinder 2. The end of the horizontal bar 9 away from the rotating rod 4 is slidably connected to the striking column 10 through a sliding hole. A spring 11 is sleeved on the upper end of the striking column 10. The upper end of the spring 11 is fixed to the outer wall of the striking column 10, and the lower end of the spring 11 is fixed to the top surface of the horizontal bar 9. The bottom of the striking column 10 is hemispherical. The top surface of the material cylinder 2 has several inclined protrusions 12 at equal angles with the center of the top surface of the material cylinder 2 as the center. The striking column 10 cooperates with the inclined protrusions 12.

[0028] While scraping off the particles attached to the inner wall of the barrel 2, the striking column 10 passes the inclined protrusion 12 and receives the pushing action of the inclined protrusion 12, which causes the stretching spring 11 of the striking column 10 to rise until the striking column 10 passes the inclined protrusion 12 and loses the pushing action. The spring 11 then quickly contracts and rebounds, causing the bottom surface of the striking column 10 to quickly strike the top surface of the barrel 2, accelerating the granulation of the plastic particles.

[0029] In summary, the entire feeding structure can automatically scrape off the plastic particles attached to the inner wall of the material cylinder 2, so that when the plastic particles are changed color, there is no need for manual peeling and cleaning, making it more convenient to use and saving manpower. In addition, due to the setting of scraper 3 and connecting plate 6, motor 8 can be turned on intermittently during daily operation to stir the plastic particles, which, together with drying, further prevents sticking and caking.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A feeding mechanism of a plastic part injection molding machine, comprising a hopper (1), a top surface of the hopper (1) is connected with a barrel (2) through a hinge rotation, characterized in that, Further comprising a scraper (3) arranged in the inner cavity of the barrel (2), the length direction of the scraper (3) is the same as the axis direction of the barrel (2), and the longitudinal outer wall of one side of the scraper (3) is in contact with the inner wall of the barrel (2); A rotating assembly is installed at the center of the barrel (2) to drive the scraper (3) to rotate around the axis of the barrel (2), and a vibrating assembly is further installed on the top surface of the barrel (2) to vibrate the top surface of the barrel (2).

2. The feed mechanism of a plastic part injection molding machine according to claim 1, wherein, The rotating assembly comprises a rotating rod (4) rotatably connected at the center of the barrel (2), the scraper (3) is fixed on the outer wall of the rotating rod (4), the upper end of the rotating rod (4) extends above the barrel (2), the top surface of the barrel (2) is fixed with a rack (7), the top surface of the rack (7) is fixed with a motor (8), and the top surface of the rotating rod (4) is fixed with the output end of the motor (8).

3. The feed mechanism of a plastic part injection molding machine according to claim 2, wherein, The motor (8) is a speed reducer.

4. The plastic part injection molding machine feed mechanism of claim 3, wherein, The outer wall of the rotating rod (4) is symmetrically fixed with two sleeves (5), the outer wall of the sleeve (5) is fixed with a connecting piece (6), and the outer wall of the scraper (3) is fixed with the two connecting pieces (6) away from the sleeve (5).

5. The plastic part injection molding machine feed mechanism of claim 2, wherein, The top surface of the rack (7) is formed with gaps at equal intervals.

6. The plastic part injection molding machine feed mechanism of claim 2, wherein, The vibrating assembly comprises a crossbar (9) fixed on the upper end of the rotating rod (4), the crossbar (9) is located above the barrel (2), one end of the crossbar (9) away from the rotating rod (4) is slidably connected with a striking column (10) through a sliding hole, the upper end of the striking column (10) is sleeved with a spring (11), the upper end of the spring (11) is fixed with the outer wall of the striking column (10), the lower end of the spring (11) is fixed with the top surface of the crossbar (9), the bottom of the striking column (10) is semi-spherical, and the top surface of the barrel (2) is formed with a plurality of inclined convexes (12) at equal angular intervals with the center of the top surface of the barrel (2) as the center, and the striking column (10) is matched with the inclined convexes (12).

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