A plastic extrusion molding equipment that reduces electrostatic adsorption
By introducing a screen and cam-driven vibrating screening structure into the plastic extrusion molding equipment, the problems of uneven melting and uneven antistatic properties caused by uneven plastic raw materials are solved, improving production efficiency and product quality while reducing equipment wear and costs.
Patent Information
- Application Number
- CN202522393174.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-11
- Publication Date
- 2026-11-06
- Estimated Expiration
- 2035-11-11
AI Technical Summary
Existing plastic extrusion molding equipment lacks an effective screening structure, resulting in uneven plastic raw material size, uneven melting, and unmelted particle residue, which affects product quality and uneven dispersion of antistatic agents. Furthermore, large pieces of material are prone to jamming the equipment, reducing production efficiency.
An inclined screen and cam are set in the feeding mechanism to form reciprocating vibration with the return spring, which screens large particles or agglomerated materials. The vibration power is provided by the coordinated transmission of the active pulley and the driven pulley. Combined with the design of the storage cylinder outlet, electrostatic adsorption is reduced to ensure uniform mixing of masterbatch.
It achieves efficient screening of plastic raw materials, avoids problems such as surface bumps and uneven antistatic properties in products, improves production efficiency and product quality, and reduces equipment wear and costs.
Smart Images
Figure CN224940523U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of plastic processing equipment, specifically a plastic extrusion molding equipment that reduces electrostatic adsorption. Background Technology
[0002] Plastic extrusion molding equipment is used to continuously extrude and shape plastic raw materials into products such as pipes and films after melting and plasticizing them. It is widely used in packaging, building materials, electronics and other fields to realize the processing of plastic raw materials into continuously molded products.
[0003] Existing plastic extrusion molding equipment generally lacks an effective screening structure during the feeding stage, resulting in unevenly sized or even agglomerated plastic raw materials directly entering the barrel. This leads to uneven heating and melting of the material within the barrel; small particles over-melt and easily decompose, while large particles may not be fully plasticized, forming unmelted granules. Ultimately, this results in surface bumps and internal stress defects in the finished product, leading to a decline in mechanical properties and appearance quality. Furthermore, uneven particle size can cause imbalances in the dispersion of functional additives such as antistatic masterbatches, rendering the antistatic effect ineffective in some areas. Large pieces of material are also prone to getting stuck in the gap between the screw and the barrel, affecting extrusion stability, potentially accelerating equipment wear, and reducing production efficiency and finished product yield. Utility Model Content
[0004] To overcome the above-mentioned defects, this utility model provides a plastic extrusion molding equipment that reduces electrostatic adsorption, thus solving the problems existing in the prior art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a plastic extrusion molding equipment for reducing electrostatic adsorption, comprising a base, a material cylinder fixedly installed on the upper end of the base, a discharge port opened at one end of the material cylinder, a drive motor fixedly installed on the upper end of the base, a transmission chamber fixedly connected on the base between the material cylinder and the drive motor, a transmission mechanism provided in the transmission chamber, a spiral blade coaxially fixedly connected to the output shaft of the drive motor passing through the transmission chamber and the material cylinder in sequence, and a gap is left between the outer periphery of the spiral blade and the inner wall of the material cylinder, and a feeding mechanism is provided on the outer wall of the transmission chamber.
[0006] As a further embodiment of this utility model: the feeding mechanism includes a support platform fixedly connected to the outer wall of the transmission chamber, a feeding hopper fixedly embedded on the support platform, the feeding hopper being connected to the material cylinder, two symmetrically distributed guide plates fixedly connected to the feeding end of the feeding hopper, a screen rotatably connected to the inner wall of the feeding hopper near the transmission chamber, a discharge port opened on the side wall of the feeding hopper corresponding to the free end of the screen, a recycling box placed below the discharge port on the support platform, two spring seats fixedly connected to the inner wall of the feeding hopper corresponding to the discharge port, a return spring fixedly connected to the two spring seats, and the upper end of the return spring being fixedly connected to the free end of the screen.
[0007] As a further embodiment of this utility model, the screen is inclined toward the discharge port.
[0008] As a further embodiment of this utility model: the transmission mechanism includes a driving pulley coaxially fixedly sleeved on the outer peripheral wall of the output shaft of the drive motor, a driven pulley rotatably connected inside the transmission chamber, and the axle of the driven pulley passing through the transmission chamber and the feeding hopper in sequence and being fixedly connected to a cam.
[0009] As a further embodiment of this utility model: the rim of the cam abuts against the lower surface of the screen.
[0010] As a further embodiment of this utility model: the driving pulley and the driven pulley are connected by a synchronous belt meshing transmission.
[0011] As a further embodiment of this utility model: a storage cylinder is connected to the material cylinder, the storage cylinder contains antistatic masterbatch, and the outlet end of the storage cylinder has ten circular holes with a diameter of 1 mm.
[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0013] 1. The inclined screen inside the hopper, combined with the reciprocating vibration formed by the rotation of the cam and the return spring, can efficiently achieve the screening effect of materials, separating materials that are too large or clumps and discharging them from the discharge port. This prevents incomplete melting and unmelted particles from remaining in the barrel due to uneven particle size, thereby avoiding quality problems such as surface bumps and uneven dispersion of antistatic agents in the products, and ensuring the antistatic performance and appearance consistency of the final product.
[0014] 2. Through the coordinated transmission of the driving pulley, driven pulley, and synchronous belt in the transmission mechanism, a single drive motor can simultaneously drive the cam to rotate while rotating the spiral blades to convey and mix materials, providing stable vibration power for the screen. This eliminates the need for an additional independent vibration motor, simplifying the overall structure of the device, reducing equipment costs, and ensuring that the material conveying rhythm of the spiral blades matches the screening rhythm of the screen, preventing material accumulation or screening lag, further enhancing the screening effect and improving production efficiency.
[0015] 3. Ten 1 mm diameter holes are provided at the outlet end of the storage cylinder, so that the masterbatch forms corresponding convex lines when it is extruded, reducing the frictional static electricity between it and the cylinder and the base raw materials, and avoiding uneven dispersion caused by static clumping; combined with the screening function, the masterbatch is mixed more evenly, effectively improving the uneven coloring of the product. Attached Figure Description
[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0017] Figure 2 This is a schematic diagram of the internal three-dimensional structure of the present invention;
[0018] Figure 3 This is a schematic diagram of the internal structure of the feeding hopper of this utility model;
[0019] Figure 4 for Figure 3 Enlarged view of point A in the image;
[0020] Figure 5 This is a three-dimensional structural diagram of the storage cylinder outlet end of this utility model.
[0021] In the diagram: 1. Base; 2. Material cylinder; 3. Discharge port; 4. Drive motor; 5. Transmission chamber; 6. Spiral blade; 7. Support platform; 8. Feed hopper; 9. Guide plate; 10. Screen; 11. Discharge port; 12. Recycling box; 13. Spring seat; 14. Return spring; 15. Drive pulley; 16. Driven pulley; 17. Cam; 18. Synchronous belt; 19. Storage cylinder. Detailed Implementation
[0022] The technical solution of this patent will be further described in detail below with reference to specific embodiments.
[0023] like Figure 1 - Figure 5 As shown, this utility model provides a technical solution:
[0024] A plastic extrusion molding equipment for reducing electrostatic adsorption includes a base 1, a material cylinder 2 fixedly installed on the upper end of the base 1, a discharge port 3 opened at one end of the material cylinder 2, a drive motor 4 fixedly installed on the upper end of the base 1, a transmission chamber 5 fixedly connected between the material cylinder 2 and the drive motor 4 on the base 1, a transmission mechanism is provided in the transmission chamber 5, the output shaft of the drive motor 4 passes through the transmission chamber 5 and the material cylinder 2 in sequence and is coaxially fixedly connected to a spiral blade 6, a gap is left between the outer periphery of the spiral blade 6 and the inner wall of the material cylinder 2, and a feeding mechanism is provided on the outer wall of the transmission chamber 5;
[0025] Specifically, the material cylinder 2 is horizontally fixed on the upper end of the base 1, and the discharge port 3 at one end is connected to the subsequent shaping mold. The drive motor 4 is started, and the output shaft of the motor passes through the transmission chamber 5 and the material cylinder 2 in sequence, driving the coaxially fixed spiral blade 6 to rotate at a stable speed inside the material cylinder 2. At this time, the gap between the outer periphery of the spiral blade 6 and the inner wall of the material cylinder 2 avoids rigid friction between the two and allows a small amount of raw material to flow back in the gap, thereby enhancing the shearing effect. After the spiral blade 6 runs smoothly, the raw material is fed into the material cylinder 2 through the feeding mechanism. The raw material moves along the inner wall of the material cylinder 2 towards the discharge port 3 under the push of the spiral blade 6, and is finally extruded and formed through the discharge port 3.
[0026] The feeding mechanism includes a support platform 7 fixedly connected to the outer wall of the transmission chamber 5. A feeding hopper 8 is fixedly embedded on the support platform 7 and is connected to the material cylinder 2. Two symmetrically distributed guide plates 9 are fixedly connected to the feeding end of the feeding hopper 8. A screen 10 is rotatably connected to the inner wall of the feeding hopper 8 near the transmission chamber 5. A discharge port 11 is opened on the side wall of the feeding hopper 8 corresponding to the free end of the screen 10. A recycling box 12 is placed on the support platform 7 below the discharge port 11. Two spring seats 13 are fixedly connected to the inner wall of the feeding hopper 8 corresponding to the discharge port 11. A return spring 14 is fixedly connected to the two spring seats 13. The upper end of the return spring 14 is fixedly connected to the free end of the screen 10. The screen 10 is inclined towards the discharge port 11.
[0027] Specifically, the plastic raw material to be processed is poured into the feeding hopper 8. The raw material slides down the guide plate 9 at the upper end of the inner wall of the feeding hopper 8 and is guided onto the screen 10. The side of the screen 10 closest to the transmission chamber 5 is rotatably connected to the inner wall of the feeding hopper 8, while the other side is a free end and is inclined towards the discharge port 11. When the screen 10 is vibrated by the push of the cam 17, the raw material with the required particle size passes through the mesh of the screen 10 and falls into the channel connected to the material cylinder 2 below, entering the material cylinder 2. The raw material with an excessively large particle size or that is agglomerated slides along the inclined screen 10 toward the discharge port 11 and finally falls into the recycling box 12 on the support platform 7 for collection. At the same time, the return spring 14 on the spring seat 13 on the inner wall of the feeding hopper 8 always pulls the free end of the screen 10 to ensure that the screen 10 can quickly return to its original position after vibration and maintain a stable screening rhythm.
[0028] The transmission mechanism includes a drive pulley 15 coaxially fixedly sleeved on the outer peripheral wall of the output shaft of the drive motor 4, a driven pulley 16 rotatably connected inside the transmission chamber 5, the axle of the driven pulley 16 passing through the transmission chamber 5 and the feeding hopper 8 in sequence and being fixedly connected to a cam 17; the rim of the cam 17 abuts against the lower surface of the screen 10; the drive pulley 15 and the driven pulley 16 are connected by a synchronous belt 18.
[0029] Specifically, after the drive motor 4 starts, its output shaft drives the coaxially fixed drive pulley 15 to rotate synchronously. The drive pulley 15 meshes with the driven pulley 16 in the transmission chamber 5 through the synchronous belt 18, causing the driven pulley 16 to rotate at the corresponding speed. One end of the axle of the driven pulley 16 is rotatably connected in the transmission chamber 5, and the other end passes through the transmission chamber 5 and the feeding hopper 8 in sequence. The cam 17 fixed at the end rotates synchronously with the axle. When the protruding part of the cam 17 rotates to the bottom of the screen 10, its rim pushes the lower surface of the free end of the screen 10, causing the screen 10 to rotate upward around the rotation axis. When the protruding part rotates away, the screen 10 returns to its original position under the tension of the return spring 14, forming a reciprocating vibration of "push-return", which efficiently separates unqualified particles in the raw materials.
[0030] A storage cylinder 19 is connected to the material cylinder 2. The storage cylinder 19 contains antistatic masterbatch. The outlet end of the storage cylinder 19 has ten circular holes with a diameter of 1 mm.
[0031] Specifically, sufficient antistatic masterbatch is pre-loaded into storage cylinder 19 to ensure unobstructed communication between its outlet and the feed cylinder 2. This connection is located in the feed section of cylinder 2, preventing the masterbatch from prematurely melting in the high-temperature zone. Ten 1mm diameter holes at the outlet of storage cylinder 19 allow the outflowing antistatic masterbatch to naturally form ten cylindrical lines, reducing the friction area between it and the inner wall of cylinder 2 and the base material. This reduces static electricity generation and prevents the masterbatch from clumping due to static adsorption. When the feeding mechanism delivers the base plastic raw material to cylinder 2, the antistatic masterbatch in storage cylinder 19 can be fed in a controlled manner via a valve, entering cylinder 2 synchronously with the base material. Under the rotation and pushing of the spiral blades 6, the masterbatch and base material are fully contacted and uniformly mixed through blade shearing and stirring. They are then transported together to the melting section for plasticization, ultimately resulting in a product with a uniform color extruded from the outlet 3.
[0032] The working principle of this utility model is as follows:
[0033] First, the material cylinder 2 is horizontally fixed on the upper end of the base 1, and the discharge port 3 at one end is connected to the subsequent shaping mold. Then, sufficient antistatic masterbatch is loaded into the storage cylinder 19, and the connection between the storage cylinder 19 and the material cylinder 2 is ensured to be unobstructed. The ten 1mm diameter circular holes at the outlet end of the storage cylinder 19 allow the surface of the outflowing antistatic masterbatch to naturally form ten cylindrical lines, reducing the friction area between it and the inner wall of the material cylinder 2 and the base raw material, thereby reducing static electricity generation and preventing the masterbatch from clumping due to static electricity.
[0034] Then the drive motor 4 is started. The motor output shaft passes through the transmission chamber 5 and the material cylinder 2 in sequence, driving the coaxial fixed spiral blade 6 to rotate at a stable speed inside the material cylinder 2. At this time, the gap between the outer periphery of the spiral blade 6 and the inner wall of the material cylinder 2 avoids rigid friction between the two and allows a small amount of raw material to flow back in the gap, thus enhancing the shearing effect.
[0035] Secondly, after the spiral blades 6 operate smoothly, the plastic raw materials to be processed are poured into the feeding hopper 8. The raw materials slide down the guide plate 9 at the upper end of the inner wall of the feeding hopper 8 and are guided onto the screen 10. The side of the screen 10 closest to the transmission chamber 5 is rotatably connected to the inner wall of the feeding hopper 8, while the other side is a free end and is inclined towards the discharge port 11. When the screen 10 is vibrated by the push of the cam 17, the raw materials with the required particle size pass through the mesh of the screen 10 and fall into the channel connected to the material cylinder 2 below, entering the material cylinder 2. The raw materials with excessively large particle size or clumps slide along the inclined screen 10 towards the discharge port 11 and finally fall into the recycling box 12 on the support platform 7 for collection. At the same time, the reset spring 14 on the spring seat 13 on the inner wall of the feeding hopper 8 always pulls the free end of the screen 10 to ensure that the screen 10 can quickly reset after vibration and maintain a stable screening rhythm.
[0036] Meanwhile, the output shaft of the drive motor 4 drives the coaxially fixed drive pulley 15 to rotate synchronously; the drive pulley 15 meshes with the driven pulley 16 in the transmission chamber 5 through the synchronous belt 18, so that the driven pulley 16 rotates at the corresponding speed; one end of the wheel axle of the driven pulley 16 is rotatably connected in the transmission chamber 5, and the other end passes through the transmission chamber 5 and the feeding hopper 8 in sequence, and the cam 17 fixed at the end rotates synchronously with the wheel axle; when the protruding part of the cam 17 rotates to the bottom of the screen 10, its wheel rim pushes the lower surface of the free end of the screen 10, so that the screen 10 rotates upward around the rotation axis; when the protruding part rotates away, the screen 10 returns to its original position under the pulling force of the return spring 14, forming a reciprocating vibration of "push-reset", which efficiently separates unqualified particles in the raw materials;
[0037] Finally, when the feeding mechanism delivers the basic plastic raw material to the barrel 2, the antistatic masterbatch in the storage cylinder 19 can be fed into the barrel 2 simultaneously with the basic raw material by controlling the feeding ratio through the valve. Under the rotation and pushing of the spiral blades 6, the masterbatch and the basic raw material are fully contacted and uniformly mixed by the shearing and stirring action of the blades. Then, they are conveyed together to the melting section for plasticization, which ultimately makes the product extruded from the outlet 3 uniform in color.
[0038] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.
Claims
1. A plastic extrusion molding equipment for reducing electrostatic adsorption, characterized in that, Includes a base (1), on which a material cylinder (2) is fixedly installed. One end of the material cylinder (2) is provided with a discharge port (3). A drive motor (4) is fixedly installed on the upper end of the base (1). A transmission chamber (5) is fixedly connected between the material cylinder (2) and the drive motor (4) on the base (1). A transmission mechanism is provided inside the transmission chamber (5). The output shaft of the drive motor (4) passes through the transmission chamber (5) and the material cylinder (2) in sequence and is coaxially fixedly connected with a spiral blade (6). A gap is left between the outer periphery of the spiral blade (6) and the inner wall of the material cylinder (2). A feeding mechanism is provided on the outer wall of the transmission chamber (5).
2. The plastic extrusion molding equipment for reducing electrostatic adsorption according to claim 1, characterized in that: The feeding mechanism includes a support platform (7) fixedly connected to the outer wall of the transmission chamber (5). A feeding hopper (8) is fixedly embedded on the support platform (7). The feeding hopper (8) is connected to the material cylinder (2). Two symmetrically distributed guide plates (9) are fixedly connected to the feeding end of the feeding hopper (8). A screen (10) is rotatably connected to the inner wall of the feeding hopper (8) near the transmission chamber (5). A discharge port (11) is opened on the side wall of the feeding hopper (8) corresponding to the free end of the screen (10). A recycling box (12) is placed on the support platform (7) below the discharge port (11). Two spring seats (13) are fixedly connected to the inner wall of the feeding hopper (8) corresponding to the discharge port (11). A return spring (14) is fixedly connected to the two spring seats (13). The upper end of the return spring (14) is fixedly connected to the free end of the screen (10).
3. The plastic extrusion molding equipment for reducing electrostatic adsorption according to claim 2, characterized in that: The screen (10) is inclined toward the discharge port (11).
4. The plastic extrusion molding equipment for reducing electrostatic adsorption according to claim 1, characterized in that: The transmission mechanism includes a drive pulley (15) coaxially fixedly sleeved on the outer peripheral wall of the output shaft of the drive motor (4), a driven pulley (16) rotatably connected inside the transmission chamber (5), and the axle of the driven pulley (16) passing through the transmission chamber (5) and the feeding hopper (8) in sequence and being fixedly connected to a cam (17).
5. The plastic extrusion molding equipment for reducing electrostatic adsorption according to claim 4, characterized in that: The rim of the cam (17) abuts against the lower surface of the screen (10).
6. The plastic extrusion molding equipment for reducing electrostatic adsorption according to claim 4, characterized in that: The driving pulley (15) and the driven pulley (16) are connected by a synchronous belt (18).
7. The plastic extrusion molding equipment for reducing electrostatic adsorption according to claim 1, characterized in that: A storage cylinder (19) is connected to the material cylinder (2), and antistatic masterbatch is stored in the storage cylinder (19). Ten round holes with a diameter of 1 mm are opened at the outlet end of the storage cylinder (19).