Feeding device for modified plastic processing

Abstract

The utility model discloses a feeding device for modified plastic processing, and belongs to a plastic preparation technology. The device comprises a feeding hopper, a negative pressure device used for preventing dust from overflowing is arranged at the upper end of the feeding hopper, the negative pressure device comprises an annular negative pressure pipe located in the upper end, dust suction openings are formed in the annular negative pressure pipe, the annular negative pressure pipe is annularly and evenly distributed, the annular negative pressure pipe is connected with an air suction pipe, and the air suction pipe is used for being connected with an air suction pump; an arc-shaped material guide cover is arranged outside the annular negative pressure pipe and comprises a dust isolation gauze layer. The negative pressure device at the upper end can prevent powder raw materials from overflowing from the upper edge opening of the feeding hopper in the feeding process.

Description

Technical Field

[0001] The utility model belongs to the technical field of plastic preparation and processing equipment, and in particular relates to a feeding device for modified plastic processing. Background Art

[0002] The preparation of modified plastics is simply a process of modifying ordinary plastics by adding specific substances for physical and chemical treatment to make them have better performance and improve their heat resistance, weather resistance, impact resistance and other characteristics.

[0003] The main process of modified plastic production includes four steps: proportioning, mixing, extrusion and subsequent processing. Material proportioning is to mix the appropriate base material and modified material in a certain proportion. For example, the base material can be common plastic materials such as polypropylene and polyethylene, and the modifier can be a toughening agent, a reinforcing agent, a stabilizer, etc. Then, the different raw materials are mixed and introduced into the feeding device to achieve mixing, and then output to the extruder to achieve thermoplasticization, melt forming and other processing.

[0004] The utility model is suitable for putting different raw materials into the feed hopper according to proportion. Most of the existing feed hoppers are of open design, that is, the top is open, which is convenient for manually pouring the weighed raw materials into it and then mixing them. However, the pouring operation will cause dust to overflow, causing environmental pollution in the workshop, etc., so a cover is also adopted. However, considering that the feed hopper needs to be cleaned during the preparation of different plastics, the cover is not sealed on the feed hopper, and the gaps around it are the channels for dust to overflow, especially when the plastic powder in the ton bag is directly added, the dust overflowing from the upper edge of the feed hopper is more polluting and wasteful. Utility Model Content

[0005] The utility model aims to provide a feeding device for processing modified plastics, which can prevent the powder raw materials from diffusing and overflowing when being poured into the feeding hopper by means of a negative pressure device.

[0006] Technical solution: A feeding device for modified plastic processing, including a feeding hopper, which is provided with a negative pressure device at the upper end of the feeding hopper for preventing dust from overflowing, the negative pressure device including an annular negative pressure tube located inside the upper end, the annular negative pressure tube is provided with dust suction ports, which are evenly distributed in an annular shape, the annular negative pressure tube is connected to an exhaust pipe, and the exhaust pipe is used to connect to an exhaust pump; an arc-shaped material guide cover is provided on the outside of the annular negative pressure tube, and the arc-shaped material guide cover includes a dust-proof mesh layer.

[0007] Preferably, a hopper cover is provided on the top of the feed hopper, and a feed pipe opening is installed on the upper end of the hopper cover.

[0008] Furthermore, the feed nozzles are provided in one or more ways to achieve mixing of different plastic raw materials.

[0009] Furthermore, the device is provided with a motor based on the hopper cover, the rotating shaft of the motor is connected with a screw push rod, and the screw push rod is located inside the feed hopper. The screw push rod includes a downward extension to a material discharge section, the material discharge section is located at the lower end of the feed hopper, and is used to mix the raw materials and output them downward. The material discharge section is connected with a mounting plate, and the mounting plate is provided with a mounting through hole for mounting.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] The utility model provides a negative pressure section on the feed hopper, and the annular negative pressure tube in the negative pressure section can generate suction during feeding, so that there is a certain negative pressure in the feed hopper, thereby attracting the diffused powder into the feed hopper during feeding to avoid dust pollution. The utility model provides an arc-shaped material guide cover on the outside of the annular negative pressure tube, and the arc-shaped material guide cover can guide the powder to fall into the feed hopper, and the dust-proof mesh layer on its surface can prevent the powder from directly contacting the annular negative pressure tube, causing the exhaust pipe to be blocked.

[0012] During the feeding process of the utility model, the asynchronous motor can drive the spiral push rod to rotate, and the materials are continuously pushed downwards while the materials are initially mixed, so as to avoid the accumulation and blockage of the feeding section. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the partial structure of the bucket cover of the utility model;

[0015] Figure 3 It is a schematic diagram of the local structure of the negative pressure section of the utility model;

[0016] Figure 4 This is a schematic diagram of the internal structure of the negative pressure arc-shaped material guide cover of the utility model;

[0017] In the figure: 1. feed hopper; 2. unloading section; 3. mounting plate; 4. mounting through hole; 5. triangular reinforcement plate; 6. upper end; 7. exhaust pipe; 8. hopper cover; 9. feed pipe opening; 10. motor; 11. spiral push rod; 12. arc-shaped material guide cover; 13. dust-proof mesh layer; 14. annular negative pressure pipe; 15. dust suction port. DETAILED DESCRIPTION

[0018] 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 of the embodiments.

[0019] See also Figure 1-4 A feeding device for modified plastic processing includes an upper hopper 1, an upper opening of the upper hopper 1 is an upper end portion 6, a negative pressure device is provided, and a bottom of the upper hopper 1 is a lower material section 2.

[0020] For the negative pressure device of the upper end portion 6, an annular negative pressure pipe 14 is installed on the inner wall of the upper edge of the feed hopper 1, and a dust suction port 15 is provided on the annular negative pressure pipe 14. There are multiple dust suction ports 15, which are evenly distributed in an annular shape at the upper end of the annular negative pressure pipe 14. An exhaust pipe 7 is provided on the outer wall of the negative pressure section 6, and the exhaust pipe 7 is connected to the annular negative pressure pipe 14;

[0021] The bucket cover 8 is installed at the upper end of the negative pressure section 6. The upper end of the bucket cover 8 is installed with a feed pipe opening 9, and three feed pipe openings 9 are provided.

[0022] See also Figure 3 and Figure 4 An arc-shaped material guide cover 12 is arranged on the outside of the annular negative pressure tube 14, and a dust-proof mesh layer 13 is arranged on the outer wall of the arc-shaped material guide cover 12. The setting of the arc-shaped material guide cover 12 can guide the powder to fall into the feed hopper 1, and the dust-proof mesh layer 13 on its surface can prevent the powder from directly contacting the annular negative pressure tube 14 and causing the exhaust pipe 7 to be blocked.

[0023] See also Figure 2 A motor 10 is installed at the middle position of the upper end of the bucket cover 8. The motor can be an asynchronous motor. The output end of the asynchronous motor runs through and extends to the lower end of the bucket cover 8, and a spiral push rod 11 ( Figure 2 The figure shows a spiral structure for pushing the screw downward from the outside), the lower end of the spiral push rod 11 extends to the inside of the material discharge section 2, and the motor 10 can drive the spiral push rod 11 to rotate, thereby assisting in mixing and preventing the material discharge section 2 from clogging.

[0024] See also Figure 1 A mounting plate 3 is provided at the lower end of the blanking section 2, and mounting through holes 4 are provided inside the four corners of the mounting plate 3. The blanking section 2 is connected to the masterbatch processing equipment through the mounting plate 3.

[0025] See also Figure 1 The upper parts of the front end and the rear end of the mounting plate 3 are welded to the blanking section 2 through triangular reinforcement plates 5, and the triangular reinforcement plates 5 ensure the structural strength of the blanking section 2.

[0026] Working principle: When in use, different raw materials required for the preparation of modified plastics can be added from three feed pipe openings 9 to avoid the occurrence of raw material agglomeration caused by concentrated feeding. During feeding, the exhaust pipe 7 on the outer wall of the negative pressure section 6 is connected to a negative pressure generating device. The negative pressure generating device can make the annular negative pressure tube 14 on the inner wall of the negative pressure section 6 generate suction, so that there is a certain negative pressure in the feed hopper 1, thereby attracting the diffused powder into the feed hopper 1 during feeding to avoid dust pollution. An arc-shaped material guide cover 12 is arranged on the outside of the annular negative pressure tube 14, and the arc-shaped material guide cover 12 can guide the powder to fall into the feed hopper 1, and the dust-proof mesh layer 13 on its surface can prevent the powder from directly contacting the annular negative pressure tube 14 and causing blockage of the exhaust pipe 7. During the feeding process, the asynchronous motor can drive the spiral push rod 11 to rotate, and continuously push the material downward while preliminarily mixing the material to avoid accumulation and blockage in the discharge section 2.

[0027] It is further explained that for the negative pressure device, intermittent or regular cleaning can be adopted, including ventilation through the exhaust pipe 7 to achieve backblowing to achieve cleaning, so as to avoid clogging of the dust-proof mesh layer 13, etc. The clogging of the dust-proof mesh layer 13 does not affect the feeding and use, but only affects the dust collection effect described in the utility model, so it can be cleaned regularly or irregularly.

[0028] It is obvious 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 features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A feeding device for processing modified plastics, comprising a feeding hopper (1), characterized in that: The device is provided with a negative pressure device for preventing dust from overflowing at the upper end (6) of the feed hopper (1), the negative pressure device comprising an annular negative pressure pipe (14) located inside the upper end (6), the annular negative pressure pipe (14) being provided with dust suction ports (15) evenly distributed in an annular shape, the annular negative pressure pipe (14) being connected to an exhaust pipe (7), the exhaust pipe (7) being used to connect to an exhaust pump; An arc-shaped material guiding cover (12) is provided on the outside of the annular negative pressure tube (14), and a dust-proof gauze layer (13) is provided on the arc-shaped material guiding cover (12).

2. The feeding device for processing modified plastics according to claim 1, characterized in that: The top of the feed hopper (1) is provided with a hopper cover (8), and the upper end of the hopper cover (8) is provided with a feed pipe opening (9).

3. The feeding device for processing modified plastics according to claim 2, characterized in that: The feed pipe opening (9) is provided in one or more portions, and is used to achieve mixing of different plastic raw materials.

4. The feeding device for processing modified plastics according to claim 1, characterized in that: The device is provided with a motor (10) based on the hopper cover (8); the rotating shaft of the motor (10) is connected to a spiral push rod (11); and the spiral push rod (11) is located inside the feed hopper (1).

5. The feeding device for processing modified plastics according to claim 4, characterized in that: The spiral push rod (11) includes a section (2) extending downward to a material discharge section (2), which is located at the lower end of the feed hopper (1) and is used to mix the raw materials and discharge them downward.

6. The feeding device for processing modified plastics according to claim 5, characterized in that: The unloading section (2) is connected to a mounting plate (3), and a mounting through hole (4) for mounting is provided on the mounting plate (3).

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