Extruder feeding hopper with cooling structure

Abstract

The utility model discloses an extruder feeding hopper with a cooling structure, relates to the field of extruders, and aims to solve the technical problems that the existing extruder feeding hopper in the prior art is of a single structure, and the lower end of the feeding hopper is directly connected with an extruder, so that the higher temperature in the extruder is easily conducted to the feeding hopper, and the temperature of the extruder is too high. The materials are easy to melt and adhere to the feeding hopper due to high temperature after being in contact with the inner wall of the feeding hopper, and the feeding process is influenced. A feed opening is formed in the lower end of the feeding hopper, a protective cover is fixedly connected to the end face of the outer side of the feeding hopper, a spiral cooling water circulating pipe is fixedly arranged on the portion, on the end face of the outer side of the feeding hopper, in the protective cover, and a cooling water circulating device is fixedly connected to one side of the protective cover.

Description

Technical Field

[0001] The utility model relates to the field of extruders, in particular to an extruder feeding hopper with a cooling structure. Background Art

[0002] Extruders can be categorized as either right-angle or bevel-angled, depending on the direction of material flow and the angle between the screw centerline. Screw extruders rely on the pressure and shear force generated by the screw's rotation to fully plasticize and evenly mix the material before forming it through the die. Plastic extruders can be broadly categorized as twin-screw extruders, single-screw extruders, and the less common multi-screw and screwless extruders. Existing extruders all use a hopper for feeding.

[0003] For example, the authorization announcement number is CN 215151704 U, an extruder, the extruder comprising an extruder barrel, an extrusion screw arranged in the extruder barrel, a filtering device radially arranged on one side of the extruder barrel along the extruder barrel, the extruder barrel having a feed end and a discharge end, a filtering inlet near the feed end and a filtering outlet near the discharge end being provided on the side wall of the extruder barrel, the filtering device comprising a plunger, a first flow channel arranged in the plunger and connected to the filtering inlet, a second flow channel connected to the filtering outlet, and a filter screen arranged between the first flow channel and the second flow channel. The extruder of the utility model, by arranging the filter screen outside the extruder barrel, can increase the filtering area by setting the size of the filter screen as needed.

[0004] Existing extruder hoppers are all single-structured. Since the lower end of the hopper is directly connected to the extruder, the higher temperature inside the extruder is easily transmitted to the hopper, causing the material to melt and adhere to the hopper due to the high temperature after contacting the inner wall of the hopper, affecting the feeding process. Therefore, the market urgently needs to develop an extruder hopper with a cooling structure to help people solve the existing problems. Utility Model Content

[0005] The purpose of the utility model is to provide an extruder feeding hopper with a cooling structure to solve the problem that the existing extruder feeding hoppers proposed in the above background technology are all single-structured. Since the lower end of the feeding hopper is directly connected to the extruder, the higher temperature inside the extruder is easily transmitted to the feeding hopper, resulting in the material contacting the inner wall of the feeding hopper and easily melting due to the high temperature and adhering to the feeding hopper, thereby affecting the feeding process.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an extruder feeding hopper with a cooling structure, comprising a feeding hopper, a feeding port being provided at the lower end of the feeding hopper, a protective cover being fixedly connected to the outer end face of the feeding hopper, a spiral cooling water circulation pipe being fixedly provided inside the protective cover and on the outer end face of the feeding hopper, a cooling water circulation device being fixedly connected to one side of the protective cover, a C-shaped support frame being fixedly connected to the upper end of the feeding hopper, a rotating shaft being rotatably connected to the middle part of the lower end of the C-shaped support frame, the lower end of the rotating shaft extending to the lower end of the inside of the feeding hopper and fixedly connected to a circular connecting piece, support plates being fixedly connected on both sides of the circular connecting piece, and scraper rods being fixedly connected to the lower ends of the two support plates.

[0007] Preferably, the space between the interior of the protective cover and the outer end surface of the feeding hopper is filled with heat insulating material.

[0008] Preferably, the upper end of one side of the spiral cooling water circulation pipe is fixedly connected to the water outlet of the cooling water circulation device after passing through the protective cover through the water inlet pipe, and the lower end of one side of the spiral cooling water circulation pipe is fixedly connected to the water inlet of the cooling water circulation device after passing through the protective cover through the return pipe.

[0009] Preferably, the outer walls of the water inlet pipe and the water return pipe are wrapped with thermal insulation cotton.

[0010] Preferably, a limiting tube is fixedly connected to the middle of the lower end of the C-shaped support frame, a driving device is fixedly provided at the middle of the upper end of the C-shaped support frame, and a driving motor is fixedly provided inside the driving device.

[0011] Preferably, the upper end of the rotating shaft passes through the middle of the limiting tube and extends into the interior of the driving device to be fixedly connected to the output shaft of the driving motor.

[0012] Preferably, the lower ends of the two scraper rods extend to the inside of the feeding port, and the outer end surfaces of the two scraper rods are in contact with the inner wall of the feeding port.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. In the utility model, through the arrangement of a spiral cooling water circulation pipe, the upper end of one side of the spiral cooling water circulation pipe is fixedly connected to the water outlet of the cooling water circulation device after passing through a protective cover through a water inlet pipe, and the lower end of one side of the spiral cooling water circulation pipe is fixedly connected to the water inlet of the cooling water circulation device after passing through a protective cover through a water return pipe. Cooling water is provided to the spiral cooling water circulation pipe through the cooling water circulation device via the water inlet pipe. The inner side of the spiral cooling water circulation pipe fits the outer end face of the hopper to cool the hopper and prevent the temperature of the hopper from rising and causing the material to melt prematurely and adhere to the inner wall of the hopper. The cooling water circulates through the spiral cooling water circulation pipe and flows back to the cooling water circulation device through the return pipe for further cooling.

[0015] 2. In this utility model, through the setting of the scraper rod, the lower ends of the two scraper rods extend to the inside of the discharge port, and the outer end faces of the two scraper rods are in contact with the inner wall of the discharge port. The two scraper rods are rotated at the same time by the rotation of the rotating shaft, so that the upper ends of the scraper rods stir the materials accumulated at the upper end of the discharge port inside the feeding hopper to prevent the materials from bridging at the upper end of the discharge port and affecting the discharge. At the same time, the lower ends of the scraper rods are extended into the inside of the discharge port to scrape the inner wall of the discharge port, reducing the possibility of the materials adhering to the inside of the discharge port.

[0016] 3. In this utility model, by setting up the heat-insulating material, the space between the inside of the protective cover and the outer end face of the hopper is filled with the heat-insulating material, and the spiral cooling water circulation pipe outside the hopper is insulated by the protective cover and the heat-insulating material to prevent the hot air in the operating environment of the extruder from affecting the spiral cooling water circulation pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a front view of an extruder feeding hopper with a cooling structure according to the present invention;

[0018] Figure 2 This is the main sectional view of the utility model;

[0019] Figure 3 It is a side sectional view of the utility model;

[0020] Figure 4 It is an enlarged view of the detail A of the present utility model.

[0021] In the figure: 1. Feed hopper; 101. Feeding port; 2. Protective cover; 201. Thermal insulation material; 202. Cooling water circulation device; 3. Spiral cooling water circulation pipe; 301. Water inlet pipe; 302. Return pipe; 4. C-shaped support frame; 401. Limiting pipe; 5. Rotating shaft; 501. Circular connector; 502. Support plate; 503. Scraper rod; 6. Driving device; 601. Driving motor. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] See also Figure 1-4, the utility model provides an embodiment: an extruder feeding hopper with a cooling structure, including a feeding hopper 1, a feeding port 101 is provided at the lower end of the feeding hopper 1, a protective cover 2 is fixedly connected to the outer end surface of the feeding hopper 1, a spiral cooling water circulation pipe 3 is fixedly provided inside the protective cover 2 and on the outer end surface of the feeding hopper 1, a cooling water circulation device 202 is fixedly connected to one side of the protective cover 2, a C-shaped support frame 4 is fixedly connected to the upper end of the feeding hopper 1, a rotating shaft 5 is rotatably connected to the middle part of the lower end of the C-shaped support frame 4, the lower end of the rotating shaft 5 extends to the lower end of the inside of the feeding hopper 1 and is fixedly connected to a circular connecting piece 501, support plates 502 are fixedly connected on both sides of the circular connecting piece 501, and scraper rods 503 are fixedly connected to the lower ends of the two support plates 502.

[0024] Furthermore, the space between the inside of the protective cover 2 and the outer end face of the hopper 1 is filled with an insulating material 201, and the spiral cooling water circulation pipe 3 outside the hopper 1 is insulated by the protective cover 2 and the insulating material 201 to prevent the hotter air in the operating environment of the extruder from affecting the spiral cooling water circulation pipe 3.

[0025] Furthermore, the upper end of one side of the spiral cooling water circulation pipe 3 passes through the protective cover 2 through the water inlet pipe 301 and is fixedly connected to the water outlet of the cooling water circulation device 202. The lower end of one side of the spiral cooling water circulation pipe 3 passes through the protective cover 2 through the return pipe 302 and is fixedly connected to the water inlet of the cooling water circulation device 202. Cooling water is provided to the spiral cooling water circulation pipe 3 through the cooling water circulation device 202 via the water inlet pipe 301. The inner side of the spiral cooling water circulation pipe 3 fits the outer end face of the hopper 1 to cool the hopper 1 to prevent the temperature of the hopper 1 from rising and causing the material to melt prematurely and adhere to the inner wall of the hopper 1. After the cooling water circulates through the spiral cooling water circulation pipe 3, it flows back to the cooling water circulation device 202 through the return pipe 302 for further cooling.

[0026] Furthermore, the outer walls of the water inlet pipe 301 and the water return pipe 302 are wrapped with heat insulation cotton to prevent the hot air in the operating environment of the extruder from affecting the water inlet pipe 301 and the water return pipe 302.

[0027] Furthermore, a limiting tube 401 is fixedly connected to the middle of the lower end of the C-shaped support frame 4 , a driving device 6 is fixedly provided at the middle of the upper end of the C-shaped support frame 4 , and a driving motor 601 is fixedly provided inside the driving device 6 .

[0028] Furthermore, the upper end of the rotating shaft 5 passes through the middle of the limiting tube 401 and extends to the inside of the driving device 6 and is fixedly connected to the output shaft of the driving motor 601. The driving motor 601 drives the rotating shaft 5 to rotate, and at the same time, the limiting tube 401 limits the rotation of the rotating shaft 5 to ensure the stability of the rotation of the rotating shaft 5.

[0029] Furthermore, the lower ends of the two scraper rods 503 extend to the inside of the discharge port 101, and the outer end faces of the two scraper rods 503 are in contact with the inner wall of the discharge port 101. The rotation of the rotating shaft 5 simultaneously drives the two scraper rods 503 to rotate, so that the upper ends of the scraper rods 503 stir the material accumulated at the upper end of the discharge port 101 inside the feeding hopper 1, preventing the material from bridging at the upper end of the discharge port 101 and affecting the discharge. At the same time, the lower ends of the scraper rods 503 are extended into the inside of the discharge port 101 to scrape the inner wall of the discharge port 101, reducing the possibility of material adhering to the inside of the discharge port 101.

[0030] Working principle: When in use, the upper end of one side of the spiral cooling water circulation pipe 3 passes through the protective cover 2 through the water inlet pipe 301 and is fixedly connected to the water outlet of the cooling water circulation device 202. The lower end of one side of the spiral cooling water circulation pipe 3 passes through the protective cover 2 through the return pipe 302 and is fixedly connected to the water inlet of the cooling water circulation device 202. Cooling water is provided to the spiral cooling water circulation pipe 3 through the cooling water circulation device 202 via the water inlet pipe 301. The inner side of the spiral cooling water circulation pipe 3 fits the outer end face of the hopper 1 to cool the hopper 1, preventing the temperature of the hopper 1 from rising and causing the material to melt prematurely and adhere to the inner wall of the hopper 1, cooling After circulating through the spiral cooling water circulation pipe 3, the water flows back to the cooling water circulation device 202 through the return pipe 302 for further cooling. When feeding, the driving motor 601 drives the rotating shaft 5 to rotate. The rotation of the rotating shaft 5 simultaneously drives the two scrapers 503 to rotate, so that the upper end of the scraper 503 stirs the material accumulated at the upper end of the discharge port 101 inside the feeding hopper 1 to prevent the material from bridging at the upper end of the discharge port 101 and affecting the discharge. At the same time, the lower end of the scraper 503 extends into the inside of the discharge port 101 to scrape the inner wall of the discharge port 101 to reduce the possibility of material adhering to the inside of the discharge port 101.

[0031] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. An extruder feeding hopper with a cooling structure, comprising a feeding hopper (1), characterized in that: The lower end of the feeding hopper (1) is provided with a discharge port (101), a protective cover (2) is fixedly connected to the outer end surface of the feeding hopper (1), a spiral cooling water circulation pipe (3) is fixedly provided inside the protective cover (2) and on the outer end surface of the feeding hopper (1), a cooling water circulation device (202) is fixedly connected to one side of the protective cover (2), the upper end of the feeding hopper (1) is fixedly connected to a C-shaped support frame (4), the middle part of the lower end of the C-shaped support frame (4) is rotatably connected to a rotating shaft (5), the lower end of the rotating shaft (5) extends to the lower end of the inside of the feeding hopper (1) and is fixedly connected to a circular connecting piece (501), both sides of the circular connecting piece (501) are fixedly connected to support plates (502), and the lower ends of the two support plates (502) are fixedly connected to scraper rods (503).

2. The extruder feeding hopper with a cooling structure according to claim 1, characterized in that: The space between the interior of the protective cover (2) and the outer end surface of the feeding hopper (1) is filled with a heat insulating material (201).

3. The extruder feeding hopper with a cooling structure according to claim 1, characterized in that: The upper end of one side of the spiral cooling water circulation pipe (3) passes through the protective cover (2) via the water inlet pipe (301) and is fixedly connected to the water outlet of the cooling water circulation device (202); the lower end of one side of the spiral cooling water circulation pipe (3) passes through the protective cover (2) via the water return pipe (302) and is fixedly connected to the water inlet of the cooling water circulation device (202).

4. The extruder feeding hopper with a cooling structure according to claim 3, characterized in that: The outer walls of the water inlet pipe (301) and the water return pipe (302) are both wrapped with heat insulation cotton.

5. The extruder feeding hopper with a cooling structure according to claim 1, characterized in that: The middle portion of the lower end of the C-shaped support frame (4) is fixedly connected to a limiting tube (401), the middle portion of the upper end of the C-shaped support frame (4) is fixedly provided with a driving device (6), and a driving motor (601) is fixedly provided inside the driving device (6).

6. The extruder feeding hopper with a cooling structure according to claim 5, characterized in that: The upper end of the rotating shaft (5) passes through the middle of the limiting tube (401) and extends into the interior of the driving device (6) to be fixedly connected to the output shaft of the driving motor (601).

7. The extruder feeding hopper with a cooling structure according to claim 5, characterized in that: The lower ends of the two scraping rods (503) extend to the inside of the feeding opening (101), and the outer end surfaces of the two scraping rods (503) are in contact with the inner wall of the feeding opening (101).

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