Single-screw extrusion granulation equipment

Abstract

The utility model relates to the technical field of pelletizers, in particular to single-screw extrusion pelletizing equipment, which comprises a single-screw extruder main body and a feeding device, the single-screw extruder main body is mounted on a base, a driving motor capable of driving the single-screw extruder main body to operate is arranged at the tail end of the base, and the feeding device is mounted on the single-screw extruder main body. The feeding device comprises a feeding cavity, a feeding motor, a connecting rod, a scraping plate and a connecting pipe, plastic raw materials are driven by the scraping plate to be redistributed in the feeding cavity, and the situation that due to surface fusion of the plastic raw materials caused by heat conduction, the plastic raw materials adhere to one another to form a bridge can be avoided; and in addition, the plastic raw materials are driven into the single-screw extruder main body through the rotating scraping plate, so that the feeding efficiency can be ensured, and the situation that feeding is not timely due to the bridging phenomenon or plastic raw material bonding is avoided.

Description

Technical Field

[0001] The utility model relates to the field of granulators, in particular to single-screw extrusion granulation equipment. Background Art

[0002] Thermoplastics are thermoplastic and can be reprocessed into new products after recycling. The main varieties include polyolefins (vinyls, olefins, styrenes, acrylates, fluorinated olefins, etc.), celluloses, polyether polyesters and aromatic heterocyclic polymers.

[0003] In the recycling process of thermoplastic plastic raw materials, a screw extruder is required. The plastic raw materials are added from the feeding port of the screw extruder, heated to a molten state and extruded into strips. After the plastic strips are cooled, they are cut and granulated to make plastic granules that are widely used.

[0004] However, due to heat conduction, adjacent plastic raw materials are prone to adhere to each other and form bridges after the plastic raw materials are heated (a single-screw mulch extruder with application number 202322764611.0 and an anti-bridging rubber feeding hopper with application number 202020246882.0 both introduce this technical problem in the background technology), which will affect the feeding efficiency of the plastic raw materials and the working efficiency of the screw extruder. The purpose of the utility model is to propose a new screw extrusion equipment that can solve the above problems. Utility Model Content

[0005] The utility model aims to provide a single-screw extrusion granulation device to solve the problems mentioned in the background technology.

[0006] To achieve the above purpose, the utility model provides the following technical solution: including a single-screw extruder body and a feeding device, the single-screw extruder body is installed on a base, and a driving motor that can drive the single-screw extruder body to operate is arranged at the end of the base.

[0007] The feeding device includes a feeding chamber, a feeding motor, a connecting rod, a scraper plate and a connecting pipe. The feeding chamber is located above the main body of the single-screw extruder. The longitudinal section of the feeding chamber is circular and a feeding pipe connected to the inside of the feeding chamber is formed at the top of the feeding chamber. The feeding pipe is used to connect with an external material conveying pipeline. The feeding motor is fixedly installed on one side of the feeding chamber. The rotating shaft of the feeding motor is located in the feeding chamber. The connecting rod is located in the feeding chamber and connected to the rotating shaft of the feeding motor. The scraper plate is located in the feeding chamber and connected to the connecting rod. Both ends of the connecting pipe are respectively connected to the bottom end of the feeding chamber and the main body of the single-screw extruder.

[0008] In order to optimize the above technical solution, further measures are taken: the axial direction of the connecting pipe is inclined, and the inclined connecting pipe helps the plastic particles to slide along the connecting pipe into the barrel of the single-screw extruder body.

[0009] As a further improvement to the above technical solution: the cross section of the scraper plate is shaped like >, such a scraper plate structure can not only collect the plastic particles that are partially melted and attached to the side of the feed chamber due to centrifugal force or high temperature, but also collect and drive them into the connecting pipe

[0010] As a further improvement of the technical solution: one side of the scraper plate is long and the other side is short, and the angle between the two sides of the scraper plate is an obtuse angle. The plastic particles can enter the space formed by the scraper plate and the feed chamber from the short side of the scraper plate, and then the plastic particles can be blocked by the long side of the scraper plate and driven into the connecting pipe by the scraper plate and enter the main body of the single-screw extruder.

[0011] As an improvement to the above technical solution: the short side of the scraper plate has no contact with the feed cavity, and the long side of the scraper plate just contacts with the feed cavity.

[0012] From the above description of the structure of the utility model, it can be seen that compared with the prior art, the utility model has the following advantages:

[0013] The utility model provides a single-screw extrusion granulation equipment, which drives the plastic raw materials to be redistributed in the feeding chamber through a scraper plate, so as to avoid the surface melting of the plastic raw materials due to heat conduction, which causes the plastic raw materials to adhere to each other and form bridges. In addition, the plastic raw materials are driven into the main body of the single-screw extruder by the rotating scraper plate, so as to ensure the feeding efficiency and avoid the untimely feeding due to the bridging phenomenon or the adhesion of the plastic raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model (left side viewing angle);

[0016] Figure 2 This is a schematic diagram of the three-dimensional structure of the utility model (right side viewing angle);

[0017] Figure 3 for Figure 1 Partial structural disassembly diagram;

[0018] Figure 4 for Figure 3 Schematic diagram of local structure;

[0019] In the figure: single screw extruder body-1, base-101, drive motor-102, feeding device-2, feeding chamber-201, feeding motor-202, connecting rod-203, scraper plate-204, connecting pipe 205, feeding pipe-206 DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Example

[0022] See also Figure 1-4 The utility model provides a single-screw extrusion granulation equipment, including a single-screw extruder body 1 and a feeding device 2. The single-screw extruder body 1 is installed on a base 101. A driving motor 102 is provided at the end of the base 101 to drive the single-screw extruder body 1 to operate.

[0023] The feeding device 2 includes a feeding chamber 201, a feeding motor 202, a connecting rod 203, a scraper plate 204 and a connecting pipe 205. The feeding chamber 201 is located above the single-screw extruder body 1. The longitudinal section of the feeding chamber 201 is circular and a feeding pipe 206 connected to the inside of the feeding chamber 201 is formed at the top of the feeding chamber 201. The feeding pipe 206 is used to connect with an external material conveying pipeline. The feeding motor 202 is fixedly installed on one side of the feeding chamber 201. The rotating shaft of the feeding motor 202 is located in the feeding chamber 201. The connecting rod 203 is located in the feeding chamber 201 and is connected to the rotating shaft of the feeding motor 202. The scraper plate 204 is located in the feeding chamber 201 and is connected to the connecting rod 203. Both ends of the connecting pipe 205 are respectively connected to the bottom end of the feeding chamber 201 and the single-screw extruder body 1, and the axial direction of the connecting pipe 205 is inclined.

[0024] The cross section of the scraper plate 204 is in the shape of a >, with one side of the scraper plate 204 being longer than the other side. The angle between the two sides of the scraper plate 204 is an obtuse angle. The short side of the scraper plate 204 has no contact with the feed cavity 201, and the long side of the scraper plate 204 just contacts with the feed cavity 201.

[0025] The control method of the present invention is to realize automatic control through an external controller. The control circuit of the controller can be realized by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0026] Working principle: Plastic raw materials can be added into the feed cavity 201 through the feed pipe 206. During the process, the scraper plate 204 is driven by the feed motor 202 to drive the plastic raw materials into the connecting tube 205. The plastic particles fall into the single-screw extruder body 1 along the connecting tube 205 and are extruded. If the plastic raw materials are partially melted and partially adhered to the feed cavity 201 and the connecting tube 205 due to heat conduction, the partially adhered plastic raw materials can be pushed by the subsequent plastic particles driven by the scraper plate 204 to migrate into the single-screw extruder body 1, thereby avoiding the bridging phenomenon of the plastic raw materials.

[0027] After the plastic raw materials are added into the feed chamber 201, they are driven by the rotating scraper plate 204 and the longitudinal section of the feed chamber 201 is circular. Therefore, these plastic raw materials will be distributed on the side of the feed chamber 201 due to centrifugal force, which can prevent the plastic raw materials from melting on the heat conduction surface and sticking to each other to form bridges. Then, the scraper plate 204 can collect these plastic raw materials and uniformly drive them into the connecting pipe 205.

[0028] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A single screw extrusion granulation equipment, characterized in that: It comprises a single-screw extruder body (1) and a feeding device (2); The single-screw extruder body (1) is mounted on a base (101), and a driving motor (102) is provided at the end of the base (101) for driving the single-screw extruder body (1) to operate; The feeding device (2) comprises a feeding chamber (201), a feeding motor (202), a connecting rod (203), a scraper plate (204) and a connecting pipe (205); The feed chamber (201) is located above the single-screw extruder body (1), the feed chamber (201) has a circular longitudinal section, and a feed pipe (206) communicating with the inside of the feed chamber (201) is formed at the top of the feed chamber (201), and the feed pipe (206) is used to be connected to an external material conveying pipeline; The feeding motor (202) is fixedly mounted on one side of the feeding chamber (201), and the rotating shaft of the feeding motor (202) is located in the feeding chamber (201); The connecting rod (203) is located in the feeding chamber (201) and is connected to the rotating shaft of the feeding motor (202); The scraper plate (204) is located in the feed chamber (201) and is connected to the connecting rod (203); The two ends of the connecting pipe (205) are respectively connected to the bottom end of the feed cavity (201) and the single-screw extruder body (1).

2. A single screw extrusion granulation equipment according to claim 1, characterized in that: The axial direction of the connecting pipe (205) is inclined.

3. The single screw extrusion granulation equipment according to claim 1, characterized in that: The cross section of the scraper plate (204) is in the shape of a >.

4. A single screw extrusion granulation equipment according to claim 3, characterized in that: One side of the scraper plate (204) is longer than the other side, and the angle between the two sides of the scraper plate (204) is an obtuse angle.

5. A single screw extrusion granulation equipment according to claim 4, characterized in that: The short side of the scraper plate (204) has no contact with the feed chamber (201), while the long side of the scraper plate (204) just contacts with the feed chamber (201).

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