A high speed continuous fiber thermoplastic composite single screw extrusion barrel

Abstract

The utility model discloses a kind of high-speed continuous fiber thermoplastic composite single-screw extrusion barrel, it is related to high-speed continuous fiber reinforced thermoplastic composite technical field, including a kind of high-speed continuous fiber thermoplastic composite single-screw extrusion barrel, including square extrusion barrel and the connecting flange of installation in square extrusion barrel one end, the inside longitudinal through of square extrusion barrel is opened with circular extrusion hole, multiple heating holes are opened with equidistance in length direction and circumferential staggered on the outside of square extrusion barrel, heating hole is equipped with heating assembly in its inside, the outside of square extrusion barrel is equipped with heat preservation component, the outside of heat preservation component is equipped with adjusting component;The utility model is through square extrusion barrel and staggered distribution heating rod, realize uniform heating function;By ceramic fiber cotton and aluminum foil reflective film cooperation, realize efficient heat preservation function;By pressing plate and heating rod cooperation, realize convenient maintenance function;By three controllers and grouping heating cable cooperation, realize partition temperature control function.

Description

Technical Field

[0001] This utility model relates to the field of high-speed continuous fiber reinforced thermoplastic composite materials technology, and in particular to a high-speed continuous fiber thermoplastic composite single-screw extrusion barrel. Background Technology

[0002] Existing continuous fiber-reinforced thermoplastic composite material production line extruders typically use modular twin-screw or single-screw extruders to plasticize and transport molten resin, continuously feeding it into the coating mold cavity. Twin-screw extrusion has a complex structure, high cost, and large footprint. Its biggest problem is that the melt pressure can only reach a maximum of 4 MPa, and the melt pressure is not very stable, requiring the addition of a melt pump for pressurization and stabilization. Single-screw extrusion is easier to pressurize, with melt pressure generally reaching over 10 MPa, directly connecting to the mold to meet coating requirements. Existing single-screw extruders generally use a circular barrel and external heating coils for heating.

[0003] Existing high-speed continuous fiber thermoplastic composite technology increases production capacity by over 100% compared to conventional continuous fiber thermoplastic composite technology. However, due to the significant increase in output, the shear heat of the plastic itself is insufficient to melt it, still requiring a large amount of external heat energy. Current heating methods utilize belt heaters wrapped around the outside of a cylindrical extruder, relying on contact to transfer heat. After a period of use, the belt heater deforms, making it difficult to maintain a 100% seal against the barrel wall, resulting in a gap between the heater and the barrel. Once this gap exists, heat transfer efficiency is significantly reduced. On one hand, high-capacity plastic production requires a large amount of heat, preventing the barrel temperature from reaching the set value. On the other hand, the belt heater continuously heats, causing it to operate for extended periods, resulting in the heater itself glowing red-hot, posing a safety hazard and limiting its lifespan. This limited heat energy not only fails to increase production capacity but also affects equipment availability, product quality, and consequently, yield, while also posing safety risks. Ultimately, this leads to uneven heating and low energy utilization. Therefore, this application designs a high-speed continuous fiber thermoplastic composite single-screw extruder barrel to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a high-speed continuous fiber thermoplastic composite single-screw extrusion barrel.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a high-speed continuous fiber thermoplastic composite single-screw extrusion cylinder, comprising a square extrusion cylinder and a connecting flange installed at one end of the square extrusion cylinder, wherein a circular extrusion hole is longitudinally opened through the interior of the square extrusion cylinder, and a plurality of heating holes are equidistantly opened along the length direction and circumferential direction on the outer side of the square extrusion cylinder, wherein a heating component is provided inside the heating hole, a heat preservation component is provided on the outer side of the square extrusion cylinder, and an adjustment component is provided on the outer side of the heat preservation component.

[0006] Preferably, a feed inlet is provided at the center of the connecting flange, one end of the circular extrusion hole is connected to the feed inlet, and connecting holes are provided at equal intervals in an annular shape on the side end of the connecting flange.

[0007] Preferably, the heating assembly consists of a heating rod and thermal grease. The heating rod is installed inside the heating hole, and the thermal grease is uniformly coated between the heating rod and the inner wall of the heating hole. An installation assembly is provided on the outer side of the heating hole.

[0008] Preferably, the heat insulation component is composed of ceramic fiber cotton and aluminum foil reflective film. The aluminum foil reflective film is installed on the outer surface of the square extrusion cylinder except for the installation component and the hole covered by it. The ceramic fiber cotton is bonded and fixed to the outside of the aluminum foil reflective film by high temperature resistant tape.

[0009] Preferably, the mounting assembly consists of a pressure plate and bolts. A threaded hole is provided on the upper end of the outer wall of the square extrusion cylinder at the side end of the heating hole. The pressure plate is installed at the upper end of the threaded hole and the heating rod. The upper end of the heating rod abuts against the lower end of the pressure plate. The bolts are rotatably installed at the upper end of the pressure plate and threadedly connected to the threaded hole.

[0010] Preferably, the adjustment assembly consists of three controllers and multiple heating cables. One end of each heating cable is installed on the side of the heating rod. The three controllers are installed at equal intervals along the length of the square extrusion cylinder at the same side edge on its outer side. The multiple heating cables are divided into three groups, and the other ends of the three groups of heating cables are respectively connected to the three controllers.

[0011] Compared with existing technologies, the advantages of this invention are as follows: This invention uses a square extrusion cylinder in conjunction with staggered heating rods and thermally conductive silicone grease. The heating rods are installed alternately along the length and circumference of the cylinder, and the thermally conductive silicone grease enhances heat conduction, facilitating uniform heating of the inner wall of the cylinder, eliminating temperature gradients, and improving the uniformity of material melting, thus achieving uniform heating. The combination of ceramic fiber cotton and aluminum foil reflective film reduces heat loss by blocking heat dissipation and reflects internal radiant heat by reflecting internal radiation, thereby reducing heat loss, lowering heating power, and improving energy efficiency, thus achieving efficient heat preservation. The combination of a pressure plate, bolts, and heating rods allows the bolts to secure the pressure plate and tighten the heating rods; removing the bolts allows for easy replacement of the heating rods without overall disassembly, simplifying maintenance and improving efficiency, thus achieving convenient maintenance. The combination of three controllers and grouped heating cables allows the controllers to control heating rods in different areas, enabling temperature adjustment of each section as needed to adapt to different material processing requirements, improving adaptability, and achieving zoned temperature control. Ultimately, this invention solves the problems of uneven heating and low energy utilization in existing devices. Attached Figure Description

[0012] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall first-view three-dimensional structure proposed in this utility model; Figure 2 This is a schematic diagram of the overall second-view three-dimensional structure proposed in this utility model; Figure 3 This is a schematic diagram of the overall cross-sectional three-dimensional structure proposed in this utility model; Figure 4 This is a three-dimensional cross-sectional structural diagram of the thermal insulation component proposed in this utility model.

[0013] The numbers in the diagram are: 1. Ceramic fiber cotton; 2. Connecting flange; 3. Controller; 4. Pressure plate; 5. Circular extrusion hole; 6. Heating cable; 7. Heating rod; 8. Square extrusion cylinder; 9. Aluminum foil reflective film; 10. Thermal grease; 11. Bolt; 12. Connecting hole. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0015] Example: See Figures 1 to 4This utility model discloses a high-speed continuous fiber thermoplastic composite single-screw extrusion barrel, comprising a square extrusion barrel 8 and a connecting flange 2 installed at one end of the square extrusion barrel 8; a circular extrusion hole 5 is longitudinally penetrating the interior of the square extrusion barrel 8, and multiple heating holes are equidistantly spaced along the length and circumferential directions on the outer side of the square extrusion barrel 8, with heating components inside the heating holes, heat insulation components on the outer side of the square extrusion barrel 8, and adjustment components on the outer side of the heat insulation components; the square extrusion barrel 8 increases the heating contact area, the circular extrusion hole 5 supplies material extrusion, the heating components provide heat, the heat insulation components reduce heat loss, and the adjustment components control the temperature to ensure stable processing; a feed port is opened at the center of the connecting flange 2, and a circular... One end of the extrusion orifice 5 is connected to the feed inlet, and the side end of the connecting flange 2 is provided with connecting holes 12 in an annular shape at equal intervals. The feed inlet guides the material into the circular extrusion orifice 5, and the connecting holes 12 facilitate the connection between the barrel and other parts of the extruder, ensuring stable installation and preventing displacement during processing. The heating assembly consists of a heating rod 7 and thermally conductive silicone grease 10. The heating rod 7 is installed inside the heating orifice, and the thermally conductive silicone grease 10 is evenly coated between the heating rod 7 and the inner wall of the heating orifice. An installation assembly is provided on the outside of the heating orifice. The thermally conductive silicone grease 10 fills the gap between the heating rod 7 and the heating orifice, enhancing the heat conduction efficiency and making the temperature of the inner wall of the square extrusion barrel 8 uniform, avoiding local overheating or insufficient melting of the material. The heating rod 7 used in this device is an SQ right-angle lead-out heating rod.

[0016] In this invention, the heat insulation component consists of ceramic fiber cotton 1 and aluminum foil reflective film 9. The aluminum foil reflective film 9 covers and is installed on the outer surface of the square extrusion cylinder 8, excluding the surface covered by the installation component and the heating hole. The ceramic fiber cotton 1 is bonded and fixed to the outside of the aluminum foil reflective film 9 with high-temperature resistant tape. The aluminum foil reflective film 9 reflects the radiant heat inside the square extrusion cylinder 8, while the ceramic fiber cotton 1 blocks heat loss to the outside. This double insulation reduces heat loss and lowers energy consumption. The installation component consists of a pressure plate 4 and bolts 11. A threaded hole is opened at the upper end of the outer wall of the square extrusion cylinder 8 at the side end of the heating hole. The pressure plate 4 is installed at the upper end of the threaded hole and the heating rod 7. The upper end of the heating rod 7 abuts against the lower end of the pressure plate 4. The bolts 11 are rotatably installed on the upper end of the pressure plate 4 and are connected to the bolts 11. The device features a threaded connection; bolts 11 are tightened onto the pressure plate 4 to ensure a tight seal between the pressure plate 4 and the heating rod 7, preventing it from loosening. The pressure plate 4 can be removed by unscrewing bolts 11 to replace the heating rod 7, making maintenance convenient. The adjustment assembly consists of three controllers 3 and multiple heating cables 6. One end of each heating cable 6 is installed on the side of the heating rod 7. The three controllers 3 are equidistantly installed along the length of the square extrusion cylinder 8 at the same side edge. The multiple heating cables 6 are divided into three groups, with the other ends of each group connected to one of the three controllers 3. The three controllers 3 independently control the heating rods 7 in different areas via the grouped heating cables 6, allowing for temperature settings for each section based on material requirements. This adapts to the processing of different composite materials and improves the equipment's versatility.

[0017] Working Principle: In use of this invention, firstly, the square extrusion cylinder 8 is installed on the extruder through the connecting hole 12 of the connecting flange 2, and a single screw extrusion blade is installed inside the circular extrusion hole 5 that runs longitudinally through the square extrusion cylinder 8; then, the connection status of the heating rod 7 in the heating assembly and the heating cable 6 in the adjusting assembly is checked, and it is confirmed that the ceramic fiber cotton 1 and the aluminum foil reflective film 9 in the insulation assembly are properly covered on the outer surface of the square extrusion cylinder 8 except for the surface covered by the mounting assembly (composed of pressure plate 4 and bolts 11) and the heating hole (for the installation of the heating rod 7); then, the power is turned on, and according to the melting characteristics of the continuous fiber thermoplastic composite material to be processed, the heating temperature of different areas of the square extrusion cylinder 8 is set by three controllers 3 that are equidistantly installed at the same side edge along the length of the square extrusion cylinder 8. The three controllers 3 divide the multiple heating cables 6 into three groups and connect them separately, independently supplying power to the heating rods 7 in the corresponding areas. The heat generated by the heating rods 7 will be coated... The thermally conductive silicone grease 10 between the extruder and the inner wall of the heating hole efficiently conducts heat to the square extrusion cylinder 8, causing the temperature of the inner wall of the circular extrusion hole 5 to rise uniformly. After the temperature reaches the set value and stabilizes, the mixture of continuous fiber and thermoplastic material is fed into the feed port opened at the center of the connecting flange 2. The single screw extrusion blades push the material along the circular extrusion hole 5. Under the uniform heating of the square extrusion cylinder 8, the material is fully melted and extruded from the circular extrusion hole 5. After processing, the three controllers 3 are turned off to stop heating. The square extrusion cylinder 8 is allowed to cool naturally. If the heating rod 7 needs maintenance, the bolts 11 that are threaded to the threaded holes on the outer wall of the square extrusion cylinder 8 in the mounting assembly can be unscrewed, and the pressure plate 4 pressing on the upper end of the heating rod 7 can be removed to replace or repair the heating rod 7. During long-term use, the heating temperature of different areas of the square extrusion cylinder 8 can be flexibly adjusted through the three controllers 3 according to the processing requirements of different continuous fiber thermoplastic composite materials to adapt to the processing of various materials, thereby completing the entire processing and maintenance process.

[0018] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high-speed continuous fiber thermoplastic composite single-screw extrusion barrel, comprising a square extrusion barrel (8) and a connecting flange (2) installed at one end of the square extrusion barrel (8), characterized in that: The square extrusion cylinder (8) has a circular extrusion hole (5) that runs through its interior longitudinally. The square extrusion cylinder (8) has multiple heating holes that are equidistantly spaced along its length and circumferential direction on its outer side. The heating holes are equipped with heating components inside. The square extrusion cylinder (8) is equipped with heat preservation components on its outer side. The heat preservation components are equipped with adjustment components on their outer side.

2. The high-speed continuous fiber thermoplastic composite single-screw extrusion barrel according to claim 1, characterized in that: The connecting flange (2) has a feed port at its center, one end of the circular extrusion hole (5) is connected to the feed port, and the connecting flange (2) has connecting holes (12) circumferentially spaced at the side end.

3. The high-speed continuous fiber thermoplastic composite single-screw extrusion barrel according to claim 1, characterized in that: The heating assembly consists of a heating rod (7) and thermal grease (10). The heating rod (7) is installed inside the heating hole. The thermal grease (10) is uniformly coated between the heating rod (7) and the inner wall of the heating hole. An installation assembly is provided on the outside of the heating hole.

4. The high-speed continuous fiber thermoplastic composite single-screw extrusion barrel according to claim 2, characterized in that: The heat insulation component consists of ceramic fiber cotton (1) and aluminum foil reflective film (9). The aluminum foil reflective film (9) is installed on the outer surface of the square extrusion cylinder (8) except for the installation component and the heating hole. The ceramic fiber cotton (1) is bonded and fixed to the outside of the aluminum foil reflective film (9) by high temperature resistant tape.

5. The high-speed continuous fiber thermoplastic composite single-screw extrusion barrel according to claim 4, characterized in that: The mounting assembly consists of a pressure plate (4) and a bolt (11). A threaded hole is provided on the upper end of the outer wall of the square extrusion cylinder (8) at the side end of the heating hole. The pressure plate (4) is installed on the upper end of the threaded hole and the heating rod (7). The upper end of the heating rod (7) abuts against the lower end of the pressure plate (4). The bolt (11) is rotatably installed on the upper end of the pressure plate (4) and threadedly connected to the threaded hole.

6. The high-speed continuous fiber thermoplastic composite single-screw extrusion barrel according to claim 5, characterized in that: The adjustment assembly consists of three controllers (3) and multiple heating cables (6). One end of the heating cable (6) is installed on the side of the heating rod (7). The three controllers (3) are installed at equal intervals along the length of the square extrusion cylinder (8) on the same side edge on its outer side. The multiple heating cables (6) are divided into three groups, and the other end of the three groups of heating cables (6) are respectively connected to the three controllers (3).

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