A material anti-sticking and anti-blocking device for an extruder feeding port

Abstract

The utility model discloses an extruder feed inlet anti -sticking material anti -blocking device, its characterized in that, including extruder cylinder, extruder screw, be provided with feed hopper on extruder cylinder, and extruder screw sets up in extruder cylinder, is provided with oil temperature cooling system in the inner wall of extruder cylinder and feed hopper, oil temperature cooling system is the cooling oil pipe of through arrangement in extruder cylinder and inner wall, the extruder screw includes screw body and screw thread, and is provided with a layer teflon coating on the surface of screw body and screw thread. The utility model technical scheme is applicable to the extrusion of different viscous material, can be used for the higher viscosity, higher temperature control requirement material extrusion, and the anti -sticking material anti -blocking device makes viscous material not easy to stack at the feed inlet, not easy to stick on the screw surface, can be widely used in various viscosity greater, temperature sensitive raw material extrusion.

Description

Technical Field

[0001] This utility model belongs to the field of refractory tube raw material production equipment, specifically relating to an anti-sticking and anti-clogging device for extruder feed inlet. Background Technology

[0002] With the rapid development of plastic pipes, people have increasingly higher demands for pipes in various applications. Ordinary pipes are prone to softening and burning when exposed to high temperatures and open flames, posing significant safety hazards. Therefore, the fire resistance of pipes has gradually become a focus for pipe manufacturers. When extruding a viscous refractory modified raw material, due to the high viscosity of the modified material used in refractory pipes, current extruders typically use cooling water for temperature control at the feed inlet. This temperature control at the feed inlet is not sensitive enough and has a wide temperature range, failing to meet the temperature control requirements of the new refractory modified material. Temperature changes easily lead to material sticking and blockage, causing raw material to accumulate at the feed inlet and affecting the continuous and stable operation of the extruder.

[0003] Furthermore, existing extruders have shallow screw grooves and poor surface anti-sticking properties. While they don't stick to general extruded raw materials, they easily adhere to sticky materials during screw rotation and shearing, causing the material to stick to the screw grooves. This results in low extrusion yield or even complete failure to extrude, severely impacting extrusion performance and making subsequent cleaning difficult. For sticky materials like modified refractory materials, stable extrusion molding is challenging. Due to raw material processing temperature limitations, excessively high extrusion temperatures lead to foaming and oxidation, while excessively low temperatures result in uneven plasticization, affecting the refractory properties of the extruded pipe. Therefore, a solution is needed that prevents sticky modified refractory materials from sticking to the screw and ensures stable extrusion production. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides an anti-sticking and anti-clogging device for the extruder feed inlet, solving technical issues such as material sticking and clogging at the extruder feed inlet and screw.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] An anti-sticking and anti-clogging device for an extruder inlet includes an extruder barrel and an extruder screw. A feed hopper is provided on the extruder barrel, and the extruder screw is disposed inside the extruder barrel. An oil temperature cooling system is provided on the inner wall of the extruder barrel and the feed hopper. The oil temperature cooling system is a cooling oil pipe arranged through the inner wall of the extruder barrel and the feed hopper. The extruder screw includes a screw body and a screw thread, and a Teflon coating is provided on the surface of the screw body and the screw thread.

[0007] In a further technical solution, the thickness of the Teflon coating is 50-100 micrometers.

[0008] In a further technical solution, the screw threads are evenly distributed on the screw body.

[0009] In a further technical solution, the thread depth of the screw thread is 7.5mm.

[0010] In a further technical solution, the cooling oil pipe includes an oil inlet and an oil outlet, and the interior of the cooling oil pipe is used to circulate cooling oil for cooling.

[0011] This utility model's technical solution is applicable to the extrusion of materials with different viscosity. It can be used for the extrusion of materials with higher viscosity and higher temperature control requirements. This anti-sticking and anti-clogging device makes it difficult for viscous materials to accumulate at the feed inlet and to stick to the screw surface. It can be widely used in the extrusion of various raw materials with high viscosity and temperature sensitivity. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the oil temperature cooling system for the feed hopper and barrel of this utility model;

[0013] Figure 2 This is a schematic diagram of the extruder screw according to the present invention;

[0014] In the diagram: 1. Feed hopper; 2. Extruder barrel; 3. Oil inlet; 4. Oil outlet; 5. Cooling oil pipe; 6. Screw body; 7. Thread depth; 8. Screw thread; 9. Extruder screw. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0016] like Figure 1 and Figure 2As shown, an anti-sticking and anti-clogging device for an extruder inlet includes an extruder barrel 2 and an extruder screw 9. A feed hopper 1 is mounted on the extruder barrel 2. The extruder screw 9 is disposed inside the extruder barrel 2. An oil temperature cooling system is provided within the inner walls of the extruder barrel 2 and the feed hopper 1. The oil temperature cooling system consists of cooling oil pipes 5 arranged through the inner walls of the extruder barrel 2 and the feed hopper 1. The extruder screw 9 includes a screw body 6 and screw threads 8, with the screw threads 8 evenly distributed on the screw body 6. A Teflon coating is applied to the surfaces of the screw body 6 and the screw threads 8. The thickness of the Teflon coating is 50-100 micrometers.

[0017] The cooling oil pipe 5 includes an oil inlet 3 and an oil outlet 4, which are respectively connected to an external oil supply device and are equipped with an oil temperature control system to regulate the temperature of the cooling oil. The cooling oil pipe 5 is used to circulate cooling oil for cooling.

[0018] This invention provides a solution to the problem of material adhesion in refractory tube extrusion. The solution addresses the issue in stages, based on its root cause. For material adhesion at the feed inlet, a more sensitive oil temperature controller is used to achieve more precise feed temperature control. For material adhesion on the extruder screw, the screw thread depth is improved, and a surface coating is applied to enhance screw smoothness and reduce adhesion. This solution is suitable for temperature-sensitive, high-viscosity polymer materials.

[0019] The oil cooling system at the feed inlet improves the cooling method by arranging cooling oil pipes 5 around the feed inlet. Cooling oil is introduced through the oil inlet 3 of the cooling oil pipes 5, exchanges heat with the extruder barrel 2 and feed hopper 1 through the cooling oil pipes 5, and flows out through the oil outlet 4. Using oil cooling, the feed inlet temperature is precisely controlled within ±3℃ of the required temperature, preventing the heat-sensitive materials with extremely high temperature precision requirements from melting due to excessive temperature deviation at the feed inlet, which could lead to feed inlet blockage.

[0020] The extruder screw surface is coated by sintering a Teflon coating on both sides of the screw thread 8 and the surface of the screw body 6 at high temperature, which improves the smoothness of the extruder screw surface, reduces the adhesion coefficient between the material and the screw, and prevents the material from sticking to the screw surface.

[0021] This invention increases the thread depth 7 of the extruder screw from the original 3.0mm to 7.5mm, thereby increasing the extrusion capacity of the screw, increasing the contact area between the material and the extruder screw, enhancing the screw's ability to convey material, and preventing material from sticking and clogging on the screw.

[0022] The specific working process of this utility model device is as follows:

[0023] (1) Check the equipment status, observe the oil level in the oil pipe, and replenish the cooling oil in time if the amount of cooling oil is insufficient.

[0024] (2) Start the oil temperature control system and adjust the control temperature of the oil temperature control system according to the characteristics of the extruded material.

[0025] (3) Start the extruder equipment and carry out extrusion production.

[0026] (4) When the extrusion production is finished, shut down the extruder.

[0027] (5) After the feed inlet temperature stabilizes, turn off the oil temperature control system.

[0028] It should be noted that other matters not detailed in this utility model belong to the prior art, such as other structures of the extruder, the control of oil temperature by the oil temperature control system, etc.

[0029] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. An anti-sticking and anti-blocking device for the feeding port of an extruder, characterized in that, The extruder includes an extruder barrel (2) and an extruder screw (9). The extruder barrel (2) is provided with a feed hopper (1). The extruder screw (9) is located inside the extruder barrel (2). An oil temperature cooling system is provided in the inner wall of the extruder barrel (2) and the feed hopper (1). The oil temperature cooling system is a cooling oil pipe (5) that runs through the inner wall of the extruder barrel (2) and the feed hopper (1). The extruder screw (9) includes a screw body (6) and a screw thread (8). A Teflon coating is provided on the surface of the screw body (6) and the screw thread (8).

2. The anti-sticking and anti-blocking device for the feed port of an extruder according to claim 1, characterized in that, The thickness of the Teflon coating is 50-100 micrometers.

3. The anti-sticking and anti-blocking device for the feed port of an extruder according to claim 1, characterized in that, The screw threads (8) are evenly distributed on the screw body (6).

4. The anti-sticking and anti-blocking device for the feed port of an extruder according to claim 1, characterized in that, The thread depth (7) of the screw thread (8) is 7.5 mm.

5. The anti-sticking and anti-blocking device for the feed port of an extruder according to claim 1, characterized in that, The cooling oil pipe (5) includes an oil inlet (3) and an oil outlet (4), and the interior of the cooling oil pipe (5) is used to pass cooling oil for cooling.

Images