Screw structure for propelling plastic powder

Abstract

The utility model relates to the technical field of plastic powder propulsion, and discloses a screw structure for plastic powder propulsion, which comprises a feeding cylinder, the rear end of the feeding cylinder is rotatably connected with a rotating rod, the front end of the rotating rod penetrates through the rear side of the feeding cylinder and is fixedly connected with a pushing thread, the front end of the pushing thread is fixedly connected with a compression section, and the compression section is fixedly connected with a screw rod. An extrusion head is fixedly connected to the front end of the compression section, a discharging head is fixedly connected to the front end of the feeding barrel, a discharging groove is formed in the front side of the discharging head, the rear side of the discharging groove communicates with the interior of the feeding barrel, and a feeding hopper communicates with the rear side of the top of the feeding barrel. According to the utility model, the pushing thread is driven by the rotating rod to rotate to push powder, the feeding barrel is heated by the heating pipe in the shell to soften the powder, the compression section is further extruded to increase the density and the temperature to realize plasticization, and finally, the plastic powder is discharged through the extrusion head and the discharge head, so that the coherent operation of feeding, plasticization and extrusion of the plastic powder is realized.

Description

Technical Field

[0001] This utility model relates to the field of plastic powder propulsion technology, and in particular to a screw structure for plastic powder propulsion. Background Technology

[0002] Plastic powder is a fine granular material made from high molecular polymers through specific processes. It has good plasticity, corrosion resistance and insulation properties. In modern industrial production, plastic powder is used in the manufacture of plastic products and surface coating treatment. The screw structure for propelling plastic powder is the core component of plastic processing equipment. It is mainly used to transport, compress and plasticize plastic powder and extrude it to make it reach the state required for subsequent processing. This structure achieves efficient propulsion and processing of plastic powder through the rotation of the screw and in conjunction with the heating device.

[0003] A search revealed Chinese patent publication number CN207722109U, which discloses a bidirectional double-helix propulsion mechanism. The mechanism is characterized by a structure comprising a feed trough, a propeller trough, a drive shaft, gears, helical propeller rods, a shaft end bearing seat, and a discharge trough. The upper part of the propeller trough is connected to the feed trough. Helical propeller rods a and b are arranged within the propeller trough to form a bidirectional double-helix propulsion system. One end of each helical propeller rod is connected to gears a and b via a quick-connect fitting. Gear a is connected to the drive shaft. The other end of b is fixed to the shaft end bearing seat by bearing, lip seal ring and bolt. The bottom of the pusher groove is provided with a discharge groove. This utility model adopts two bidirectional anti-spiral push rods to push at the same time to realize the bidirectional material pushing work, so that the force on the material during the pushing process is more uniform. The bidirectional spiral pusher is mainly used for the pelleting machine to push and squeeze the prepared medicine powder. However, in the actual use of the device, although it can feed in both directions at the same time, the extrusion is not complete when discharging. The powdered items are not compacted to create gas space, resulting in discontinuous discharge. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a screw structure for plastic powder propulsion, which aims to improve the problem in the prior art that although bidirectional feeding can be carried out simultaneously during feeding, the extrusion is incomplete during discharge, resulting in discontinuous discharge.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a screw structure for propelling plastic powder, comprising a feeding cylinder, a rotating rod rotatably connected to the rear end of the feeding cylinder, a pushing thread fixedly connected to the front end of the rotating rod penetrating the rear side of the feeding cylinder, a compression section fixedly connected to the front end of the pushing thread, an extrusion head fixedly connected to the front end of the compression section, a discharge head fixedly connected to the front end of the feeding cylinder, a discharge groove provided on the front side of the discharge head, the rear side of the discharge groove communicating with the interior of the feeding cylinder, a feed hopper connected to the rear top of the feeding cylinder, a feed groove provided at the bottom inner side of the feed hopper, a shell fixedly connected to the outer wall of the feeding cylinder, a heating tube fixedly connected inside the shell, and an adjustment mechanism provided at the bottom of the feeding cylinder.

[0006] The above technical solution involves using a screw structure for feeding plastic powder. Plastic powder is fed from the hopper through the feed chute into the feeding cylinder. When the rotating rod rotates, it drives the push thread fixedly connected to its front end to rotate as well. The spiral structure of the push thread pushes the plastic powder forward within the feeding cylinder. During this process, the heating element inside the outer shell heats the feeding cylinder, causing the plastic powder to gradually soften. As the plastic powder is continuously pushed to the compression section, it is further compressed, increasing its density and raising its temperature, thus achieving a better plasticizing effect. The plasticized plastic is then extruded through the extrusion head and finally discharged from the discharge chute of the outlet head. This completes the feeding process of the plastic powder from feeding to plasticizing and extrusion, ensuring that the plastic powder is extruded in a suitable state for subsequent processing.

[0007] As a further description of the above technical solution:

[0008] The adjustment mechanism includes two arc-shaped plates. The tops of the two arc-shaped plates are fixedly connected to the front and rear sides of the bottom of the feeding cylinder, respectively. A U-shaped plate is fixedly connected to the bottom of each of the two arc-shaped plates. A vertical plate is rotatably connected to the bottom of each of the two U-shaped plates. A support plate is slidably connected to the bottom of each of the two vertical plates. Multiple adjustment holes are opened on the front side of each of the two vertical plates. Adjustment bolts are rotatably connected to the top of the front side of each of the two support plates. A base plate is fixedly connected to the bottom of each of the two support plates.

[0009] The above technical solution allows for the following: When it is necessary to adjust the angle or position of the feeding cylinder, the adjusting bolt on the top front side of the support plate is rotated. The adjusting bolt can be matched with the adjusting holes at different positions. By tightening the adjusting bolt, it is inserted into the corresponding adjusting hole, thereby fixing the position of the upright plate on the support plate. Since the upright plate and the U-shaped plate are rotatably connected, the change in the position of the upright plate will drive the U-shaped plate and the arc plate to move, thereby changing the angle or position of the feeding cylinder.

[0010] As a further description of the above technical solution:

[0011] A switch is fixedly connected to the front right side of the feeding cylinder, and the switch is electrically connected to the heating tube.

[0012] The above technical solution allows for the following: when it is necessary to heat the plastic powder in the feeding cylinder, the switch is turned on and the heating element begins to work.

[0013] As a further description of the above technical solution:

[0014] A thermometer is fixedly connected to the front right side of the feeding cylinder, and the left end of the thermometer penetrates through the outer shell.

[0015] Through the above technical solution, the temperature gauge can display the temperature inside the feeding cylinder in real time, allowing operators to understand the temperature of the plastic powder during the heating process.

[0016] As a further description of the above technical solution:

[0017] Both adjusting bolts have slidably connected washers on their outer walls, and the left sides of the two washers are respectively attached to the right sides of the corresponding support plates.

[0018] Through the above technical solution: when the adjusting bolt is tightened to fix the position of the upright plate, the shim can increase the friction between the adjusting bolt and the support plate, prevent the adjusting bolt from loosening, and make the upright plate more securely fixed.

[0019] As a further description of the above technical solution:

[0020] Both of the support plates are fixedly connected to the left and right sides with triangular reinforcing plates, and the bottoms of the multiple triangular reinforcing plates are fixedly connected to the top of the corresponding base plates.

[0021] The above technical solution enhances the connection strength and stability between the support plate and the base plate, effectively preventing the support plate from deforming or shaking under stress.

[0022] As a further description of the above technical solution:

[0023] An inclined plate is fixedly connected to the rear side of the inside of the feed hopper, and multiple guide grooves are opened on the front side of the inclined plate.

[0024] The above technical solution allows the inclined plate to guide the plastic powder into the feeding cylinder after it enters the hopper, preventing the powder from accumulating in the hopper.

[0025] As a further description of the above technical solution:

[0026] Both base plates have mounting grooves at their bottoms, and multiple rubber pads are fixedly connected inside each mounting groove.

[0027] Through the above technical solution, the rubber pad can play a role in buffering and shock absorption. The rubber pad can reduce the impact of vibration on the surrounding environment, and at the same time reduce the wear and tear on the equipment itself caused by vibration.

[0028] This utility model has the following beneficial effects:

[0029] 1. In this utility model, plastic powder is fed into the feeding cylinder through the feeding hopper and feeding trough. The rotating rod drives the pushing screw to rotate and push the powder. The heating tube inside the outer shell heats the feeding cylinder to soften the powder. The compression section further extrudes and increases the density and temperature to achieve plasticization. Finally, the powder is discharged through the extrusion head and the discharge head. This realizes the continuous operation of plastic powder from feeding, plasticization to extrusion, ensuring that the powder is extruded in an ideal state to meet the needs of subsequent processing.

[0030] 2. In this utility model, by rotating the adjusting bolt, the position of the upright plate is fixed by matching it with different adjusting holes on the upright plate. The upright plate drives the U-shaped plate and the arc plate to move, thereby adjusting the angle or position of the feeding cylinder. At the same time, the inclined plate in the feeding hopper guides the flow of plastic powder, realizing the adjustment of the feeding cylinder to adapt to different working requirements, and ensuring smooth feeding of plastic powder to avoid accumulation. Attached Figure Description

[0031] Figure 1 This is a perspective view of a screw structure for propelling plastic powder according to the present invention.

[0032] Figure 2 This is a front view of a screw structure for propelling plastic powder according to the present invention;

[0033] Figure 3 This is a cross-sectional view of a screw structure for propelling plastic powder proposed in this utility model.

[0034] Figure 4 for Figure 3 Enlarged view of point A in the image;

[0035] Figure 5 This is a structural exploded view of a screw structure for propelling plastic powder proposed in this utility model.

[0036] Legend:

[0037] 1. Feeding cylinder; 2. Adjusting mechanism; 201. Arc plate; 202. U-shaped plate; 203. Vertical plate; 204. Support plate; 205. Adjusting hole; 206. Adjusting bolt; 207. Base plate; 3. Rotating rod; 4. Pushing thread; 5. Compression section; 6. Extrusion head; 7. Discharge head; 8. Discharge chute; 9. Feed hopper; 10. Feed chute; 11. Outer shell; 12. Heating tube; 13. Switch; 14. Thermometer; 15. Gasket; 16. Triangular reinforcing plate; 17. Inclined plate; 18. Guide channel; 19. Mounting groove; 20. Rubber pad. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] Reference Figure 1 , Figure 2 and Figure 3This utility model provides an embodiment of a screw structure for propelling plastic powder, including a feeding cylinder 1. A rotating rod 3 is rotatably connected to the rear end of the feeding cylinder 1. Rotation of the rotating rod 3 provides power for propelling the plastic powder. A pushing thread 4 is fixedly connected to the front end of the rotating rod 3, passing through the rear side of the feeding cylinder 1. The pushing thread 4 rotates under the drive of the rotating rod 3, pushing the plastic powder forward. A compression section 5 is fixedly connected to the front end of the pushing thread 4, compressing the pushed plastic powder to increase its density. An extrusion head 6 is fixedly connected to the front end of the compression section 5, extruding the compressed plastic powder to form a specific shape. A discharge head 7 is fixedly connected to the front end of the feeding cylinder 1, guiding the extruded plastic powder out smoothly. A discharge groove 8 is opened on the front side of the discharge head 7, serving as the final discharge channel for the plastic powder. The rear side of the discharge groove 8 is connected to the feeding cylinder. The internal components of the feeding cylinder 1 are interconnected to ensure that the plastic powder can smoothly reach the discharge chute 8 from the feeding cylinder 1. The top rear side of the feeding cylinder 1 is connected to the feed hopper 9, which is used to add plastic powder into the feeding cylinder 1. The feed hopper 9 has a feed chute 10 at the bottom of its inner side, which can control the flow rate and speed of the plastic powder entering the feeding cylinder 1. The outer wall of the feeding cylinder 1 is fixedly connected to the outer shell 1. The outer shell 11 can protect the feeding cylinder 1 and its internal parts, and also play a certain role in heat preservation. The heating tube 12 is fixedly connected inside the outer shell 11. The heating tube 12 can heat the plastic powder in the feeding cylinder 1, making it soft and easier to push. The bottom of the feeding cylinder 1 is provided with an adjustment mechanism 2, which can adjust the angle or position of the feeding cylinder 1 to adapt to different working requirements. The front right side of the feeding cylinder 1 is fixedly connected to a switch 13, which is used to control the opening and closing of the heating tube 12 for convenient operation.

[0040] Specifically, when using the screw structure for feeding plastic powder, the plastic powder is fed from the feed hopper 9 through the feed groove 10 into the feeding cylinder 1. When the rotating rod 3 rotates, it drives the push thread 4 fixedly connected to its front end to rotate together. The spiral structure of the push thread 4 pushes the plastic powder forward in the feeding cylinder 1. During the pushing process, the heating tube 12 inside the outer shell 11 heats the feeding cylinder 1, causing the plastic powder in the cylinder to gradually soften. As the plastic powder is continuously pushed to the compression section 5, the compression section 5 squeezes it, further compressing the plastic powder, increasing its density, and at the same time, the temperature also rises further, thereby achieving a better plasticizing effect. The plasticized plastic is extruded through the extrusion head 6 and finally discharged from the discharge groove 8 of the discharge head 7, realizing the complete pushing process of plastic powder from feeding to plasticizing extrusion, ensuring that the plastic powder can be extruded in a suitable state for subsequent processing. When it is necessary to heat the plastic powder in the feeding cylinder 1, the switch 13 is turned on, and the heating tube 12 starts to work.

[0041] Reference Figure 5The adjusting mechanism 2 includes two arc-shaped plates 201. The arc-shaped plates 201 adapt to the shape of the bottom of the feeding cylinder 1 through their arc structure, achieving a stable connection with the feeding cylinder 1. The tops of the two arc-shaped plates 201 are fixedly connected to the front and rear sides of the bottom of the feeding cylinder 1, respectively. This connects the adjusting mechanism 2 to the feeding cylinder 1, allowing the adjusting mechanism 2 to support and adjust the feeding cylinder 1. U-shaped plates 202 are fixedly connected to the bottom of each of the two arc-shaped plates 201. The U-shaped plates 202 provide a rotational support point and space for the upright plate 203. The bottoms of the two U-shaped plates 202 are rotatably connected to the upright plate 203. The rotation of the upright plate 203 can cause the feeding cylinder 1 to change its angle. Support plates 204 are slidably connected to the bottom of each of the two upright plates 203. The support plates 204 support the upright plate 203, and the upright plate 203 can... The position can be adjusted by sliding on it. Multiple adjustment holes 205 are opened on the front side of the two upright plates 203. The adjustment holes 205 are used to cooperate with the adjustment bolts 206 to fix the position of the upright plates 203. The top of the front side of the two support plates 204 are rotatably connected with adjustment bolts 206. The adjustment bolts 206 can adjust and fix the position of the upright plates 203 by cooperating with different adjustment holes 205. The bottom of the two support plates 204 is fixedly connected with a base plate 207. The base plate 207 provides a stable support foundation for the entire adjustment mechanism 2. The bottom of the two base plates 207 is provided with a mounting groove 19. The mounting groove 19 is used to install rubber pads 20. Multiple rubber pads 20 are fixedly connected inside the two mounting grooves 19. The rubber pads 20 can play the role of buffering shock absorption and increasing friction, making the adjustment mechanism 2 more stable.

[0042] Specifically, when it is necessary to adjust the angle or position of the feeding cylinder 1, the adjusting bolt 206 on the top front side of the support plate 204 is rotated. The adjusting bolt 206 can cooperate with the adjusting holes 205 at different positions. By tightening the adjusting bolt 206, it is inserted into the corresponding adjusting hole 205, thereby fixing the position of the upright plate 203 on the support plate 204. Since the upright plate 203 is rotatably connected to the U-shaped plate 202, the change in the position of the upright plate 203 will drive the U-shaped plate 202 and the arc plate 201 to move, thereby changing the angle or position of the feeding cylinder 1. The rubber pad 20 can play a role in buffering and shock absorption.

[0043] Reference Figure 1 , Figure 4 and Figure 5A thermometer 14 is fixedly connected to the front right side of the feeding cylinder 1. The thermometer 14 can display the temperature inside the feeding cylinder 1 in real time, making it convenient for operators to understand the temperature conditions inside the cylinder. The left end of the thermometer 14 penetrates through the outer shell 11, allowing the thermometer 14 to directly contact the internal environment of the feeding cylinder 1. Washers 15 are slidably connected to the outer walls of both adjusting bolts 206. The washers 15 increase friction when the adjusting bolts 206 are tightened, preventing the bolts from loosening. The left sides of the two washers 15 respectively abut against the right sides of the corresponding support plates 204, ensuring that the washers 15 can effectively function and securely connect the adjusting bolts 206 and the support plates 204. Triangular reinforcing plates 16 are fixedly connected to both the left and right sides of the support plate 204. The triangular reinforcing plates 16 enhance the structural strength of the support plate 204 by utilizing the stability of triangles. The bottoms of multiple triangular reinforcing plates 16 are fixedly connected to the tops of the corresponding base plates 207, further reinforcing the connection between the support plate 204 and the base plates 207 and improving overall stability. An inclined plate 17 is fixedly connected to the rear side of the inside of the feed hopper 9. The inclined plate 17 can guide the plastic powder to flow into the feeding cylinder 1 and prevent the powder from accumulating in the feed hopper 9. Multiple guide grooves 18 are opened on the front side of the inclined plate 17. The guide grooves 18 can make the plastic powder enter the feeding cylinder 1 more evenly and ensure the stability of feeding.

[0044] Specifically, the thermometer 14 can display the temperature inside the feeding cylinder 1 in real time, allowing operators to understand the temperature of the plastic powder during the heating process. When the adjusting bolt 206 is tightened to fix the position of the upright plate 203, the shim 15 can increase the friction between the adjusting bolt 206 and the support plate 204, preventing the adjusting bolt 206 from loosening and making the upright plate 203 more secure. This enhances the connection strength and stability between the support plate 204 and the base plate 207, effectively preventing the support plate 204 from deforming or shaking under stress. When the plastic powder enters the feed hopper 9, the inclined plate 17 can guide the plastic powder to flow into the feeding cylinder 1, preventing the powder from accumulating in the feed hopper 9.

[0045] Working principle: When using the screw structure for plastic powder propulsion, plastic powder is fed from the feed hopper 9 through the feed trough 10 into the feeding cylinder 1. When the rotating rod 3 rotates, it drives the push thread 4 fixedly connected to its front end to rotate together. The spiral structure of the push thread 4 pushes the plastic powder forward in the feeding cylinder 1. During the pushing process, the heating tube 12 inside the outer shell 11 heats the feeding cylinder 1, causing the plastic powder in the cylinder to gradually soften. As the plastic powder is continuously pushed to the compression section 5, the compression section 5 squeezes it, further compressing the plastic powder, increasing its density, and at the same time, the temperature also rises further, thereby achieving a better plasticizing effect. The plasticized plastic is extruded through the extrusion head 6 and finally discharged from the discharge trough 8 of the discharge head 7. This realizes the complete propulsion process of plastic powder from feeding to plasticizing extrusion, ensuring that the plastic powder can be extruded in a suitable state for subsequent processing.

[0046] Furthermore, when it is necessary to adjust the angle or position of the feeding cylinder 1, the adjusting bolt 206 on the top front side of the support plate 204 is rotated. The adjusting bolt 206 can cooperate with the adjusting holes 205 at different positions. By tightening the adjusting bolt 206, it is inserted into the corresponding adjusting hole 205, thereby fixing the position of the upright plate 203 on the support plate 204. Since the upright plate 203 is rotatably connected to the U-shaped plate 202, the change in the position of the upright plate 203 will drive the U-shaped plate 202 and the arc plate 201 to move, thereby changing the angle or position of the feeding cylinder 1. When the plastic powder enters the feed hopper 9, the inclined plate 17 can guide the plastic powder to flow into the feeding cylinder 1, avoiding the accumulation of powder in the feed hopper 9.

[0047] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A screw configuration for plastic powder advancement comprising a feed barrel (1) characterized by: The rear end of the feeding cylinder (1) is rotatably connected to a rotating rod (3). The front end of the rotating rod (3) passes through the rear side of the feeding cylinder (1) and is fixedly connected to a pushing thread (4). The front end of the pushing thread (4) is fixedly connected to a compression section (5). The front end of the compression section (5) is fixedly connected to an extrusion head (6). The front end of the feeding cylinder (1) is fixedly connected to a discharge head (7). The front side of the discharge head (7) is provided with a discharge groove (8). The rear side of the discharge groove (8) is connected to the interior of the feeding cylinder (1). The rear side of the top of the feeding cylinder (1) is connected to a feeding hopper (9). The bottom of the inner side of the feeding hopper (9) is provided with a feeding groove (10). The outer wall of the feeding cylinder (1) is fixedly connected to a shell (11). The interior of the shell (11) is fixedly connected to a heating tube (12). The bottom of the feeding cylinder (1) is provided with an adjustment mechanism (2).

2. A screw configuration for plastic powder advancement according to claim 1, wherein: The adjustment mechanism (2) includes two arc-shaped plates (201). The tops of the two arc-shaped plates (201) are fixedly connected to the front and rear sides of the bottom of the feeding cylinder (1), respectively. The bottoms of the two arc-shaped plates (201) are fixedly connected to U-shaped plates (202). The bottoms of the two U-shaped plates (202) are rotatably connected to upright plates (203). The bottoms of the two upright plates (203) are slidably connected to support plates (204). The front sides of the two upright plates (203) are provided with multiple adjustment holes (205). The tops of the front sides of the two support plates (204) are rotatably connected to adjustment bolts (206). The bottoms of the two support plates (204) are fixedly connected to base plates (207).

3. A screw configuration for plastic powder advancement according to claim 1, wherein: A switch (13) is fixedly connected to the right side of the front end of the feeding cylinder (1), and the switch (13) is electrically connected to the heating tube (12).

4. A screw configuration for plastic powder advancement according to claim 1, wherein: A thermometer (14) is fixedly connected to the right side of the front end of the feeding cylinder (1), and the left end of the thermometer (14) penetrates the outer shell (11).

5. A screw configuration for plastic powder advancement according to claim 2, wherein: Both adjusting bolts (206) have slidably connected gaskets (15) on their outer walls, and the left sides of the two gaskets (15) are respectively attached to the right sides of the corresponding support plates (204).

6. A screw configuration for plastic powder advancement according to claim 2, wherein: Both of the two support plates (204) are fixedly connected to the left and right sides with triangular reinforcing plates (16), and the bottoms of the multiple triangular reinforcing plates (16) are fixedly connected to the top of the corresponding base plate (207).

7. A screw configuration for plastic powder advancement according to claim 1, wherein: An inclined plate (17) is fixedly connected to the rear side of the feed hopper (9), and multiple guide grooves (18) are provided on the front side of the inclined plate (17).

8. A screw configuration for plastic powder advancement according to claim 2, wherein: The bottom of both base plates (207) is provided with mounting grooves (19), and multiple rubber pads (20) are fixedly connected inside the two mounting grooves (19).

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