Plastic extrusion net high speed rotating head

Abstract

The application belongs to the technical field of plastic extrusion net forming, and discloses a plastic extrusion net high-speed rotating machine head. The machine head comprises a rotating joint, a box body, an outer rotating body, an inner rotating body, an oil return pipe, an oil tank, an oil inlet pipe, a machine head body, a flow channel body, an oil pump, a motor, a heat exchange oil pipe, an inner rotating body bearing and a bearing seat. The application provides a new cooling and lubricating mode of the rotating net machine head and a method for reducing the pressure of the inner and outer rotating bodies of the machine head, so that the rotating machine head can operate at high speed.

Description

Technical Field

[0001] This invention belongs to the field of plastic extrusion mesh forming technology, specifically relating to a high-speed rotating die head for plastic extrusion mesh. Background Technology

[0002] In the plastics processing industry, the extruder head is the core component of the plastic extruder, and its performance directly affects product quality and production efficiency. With the continuous development of plastics processing technology, the performance requirements for extruder heads are becoming increasingly stringent, especially during high-speed rotary extrusion, where the stability and durability of the extruder head have become key indicators for evaluating its performance.

[0003] Currently, most traditional plastic extruder heads adopt a static or low-speed rotation design. While this design meets the basic needs of plastic processing to a certain extent, if high-speed rotation extrusion is required, the equipment cannot operate stably at high speed for a long time due to the excessive fluid pressure of the plastic material and the frictional heat generated by rotation, which seriously affects product quality and production efficiency. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention provides a high-speed rotating die head for plastic extrusion mesh. It proposes a new cooling and lubrication method for the rotating die head, as well as a method to reduce the pressure on the inner and outer rotating parts of the die head, enabling the rotating die head to operate at high speeds. Oil circulation cools the inner rotating part, reduces frictional heat, and better lubricates the bearings. Simultaneously, it reduces the pressure on the inner and outer rotating parts, preventing overheating and excessive pressure on the inner rotating part of the die head. This ensures the stability of the inner and outer rotating parts' operation, thereby improving the speed, production efficiency, and stability of the plastic extrusion mesh.

[0005] The above-mentioned objective of this invention is achieved through the following technical solution: a high-speed rotating head for plastic extrusion mesh, comprising a rotary joint, a housing, an outer rotating body, an inner rotating body, an oil return pipe, an oil tank, an oil inlet pipe, an outer body of the head, an oil pump, a motor, a heat exchange oil pipe, a lower bearing of the inner rotating body, a bearing seat, an inner body of the head, an upper bearing of the inner rotating body, a sealing ring of the inner rotating body, and a sealing ring of the outer rotating body; the rotary joint is installed on the top of the inner rotating body, and the housing is connected below the bearing seat; the bottom of the housing is provided with the outer body of the head, the inner body of the head, the outer rotating body, and the inner rotating body from the outside to the inside; a plastic fluid cavity is formed between the outer body of the head and the inner body of the head; the outer body of the head and the inner body of the head are connected to the housing; the upper and lower bearings of the inner rotating body are fixed on the inner rotating body; the bearing seat is connected to the oil tank through the oil return pipe; the oil tank is connected to the oil pump on the motor through the heat exchange oil pipe; and the oil pump is connected to the rotary joint through the oil inlet pipe.

[0006] Furthermore, the bottom of the machine head is provided with an outer rotating body and an inner rotating body from the outside to the inside. Between the outer rotating body and the inner rotating body, there are also an inner rotating body sealing ring, an outer rotating body sealing ring, an inner body of the machine head, and an outer body of the machine head. A material cavity is formed between the outer body of the machine head and the inner body of the machine head. The inner rotating body sealing ring is located at the bottom of the inner rotating body, the outer rotating body sealing ring is located at the bottom of the outer rotating body, and both the inner rotating body sealing ring and the outer rotating body sealing ring act on the inner body of the machine head.

[0007] The above-mentioned lubrication and cooling method for the high-speed rotating head of the plastic extrusion mesh is as follows: After the heat transfer oil in the oil tank is cooled by the heat exchange oil pipe, the oil pump driven by the motor injects the heat transfer oil into the bearing position at the bottom of the inner rotating body through the oil inlet pipe and the rotary joint. Then, the oil flows from the inside of the inner rotating body through the oil outlet hole to the cavity between the inner rotating body and the inner body of the head to lubricate the lower bearing of the inner rotating body and cool the inner rotating body. Then, the oil returns along the cavity to the top bearing seat to lubricate the upper bearing of the inner rotating body and then returns to the oil tank along the return oil pipe.

[0008] The beneficial effects of this invention compared to existing technologies are as follows: This invention proposes a new cooling and lubrication method for the rotating head, and a method to reduce the pressure on the inner and outer rotating parts of the head, enabling the rotating head to operate at high speed. Oil circulation cools the inner rotating part, reduces frictional heat, and better lubricates the bearings. Simultaneously, it reduces the pressure on the inner and outer rotating parts, preventing overheating and excessive pressure on the inner rotating part of the head. This ensures the stability of the inner and outer rotating parts' operation, thereby improving the speed, production efficiency, and stability of the plastic extrusion mesh. The superior stability of the rotating head increases the production speed and efficiency of the plastic extrusion mesh, saves production costs, and reaches a world-leading level. Attached Figure Description

[0009] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Figure 1 This is a schematic diagram of the high-speed rotating head structure and cooling and lubrication of the plastic extrusion mesh of the present invention; Figure 2 A schematic diagram of the lower flow channel structure of an existing plastic extrusion screen die head; Figure 3 This is a schematic diagram of the flow channel structure at the lower part of the high-speed rotating die head of the plastic extrusion mesh of the present invention.

[0010] In the diagram: 1. Rotary joint; 2. Housing; 3. Outer rotating body; 4. Inner rotating body; 5. Oil return pipe; 6. Oil tank; 7. Oil inlet pipe; 8. Outer body of the machine head; 9. Oil pump; 10. Motor; 11. Heat exchange oil pipe; 12. Lower bearing of the inner rotating body; 13. Bearing housing; 14. Inner body of the machine head; 15. Upper bearing of the inner rotating body; 16. Sealing ring of the inner rotating body; 17. Sealing ring of the outer rotating body; Detailed Implementation

[0011] The present invention is described in detail below through specific embodiments, but this does not limit the scope of protection of the present invention. Unless otherwise specified, the experimental methods used in the present invention are all conventional methods, and the experimental equipment, materials, reagents, etc. used can all be obtained commercially. Example

[0012] High-speed rotating head for plastic extrusion mesh The device includes a rotary joint, a housing, an outer rotating body, an inner rotating body, a return oil pipe, an oil tank, an inlet oil pipe, an outer body of the machine head, an oil pump, a motor, a heat exchange oil pipe, a lower bearing of the inner rotating body, a bearing housing, an inner body of the machine head, and an upper bearing of the inner rotating body. The rotary joint is installed on the top of the inner rotating body, and the housing is connected to the bearing housing. From the outside to the inside, the bottom of the housing consists of the outer body of the machine head, the inner body of the machine head, the outer rotating body, and the inner rotating body. There is a plastic fluid cavity between the outer body of the machine head and the inner body of the machine head. The outer body of the machine head and the inner body of the machine head are connected to the housing. The upper and lower bearings of the inner rotating body are fixed on the inner rotating body. The bearing housing is connected to the oil tank through the return oil pipe. The oil tank is connected to the oil pump on the motor through the heat exchange oil pipe. The oil pump is connected to the rotary joint through the inlet oil pipe.

[0013] Lubrication and cooling working principle: After the heat transfer oil in the oil tank is cooled by the heat exchange oil pipe, the oil pump driven by the motor injects the heat transfer oil into the bearing position at the bottom of the inner rotating body through the oil inlet pipe and rotary joint. Then, it flows from the inside of the inner rotating body through the oil outlet hole into the cavity between the inner rotating body and the inner body of the machine head to lubricate the lower bearing of the inner rotating body and cool the inner rotating body. Then, it returns along the cavity to the top bearing seat to lubricate the upper bearing of the inner rotating body, and finally returns to the oil tank through the return oil pipe.

[0014] Methods to reduce pressure, such as Figure 3 As shown: The device includes the following components: inner rotating sealing ring, outer rotating sealing ring, outer rotating body, inner rotating body, inner head body, and outer head body.

[0015] Current nose flow channels are all based on Figure 2 As shown: the inner rotating body sealing ring and the outer rotating body sealing ring act on the inner body and outer body of the machine head respectively. This design will generate a large downward discharge pressure, which acts on the inner rotating body and the outer rotating body respectively. The huge downward pressure will shorten the life of the thrust bearing on the inner rotating body and affect the stability of the machine head operation.

[0016] New head flow channel, such as Figure 3 As shown: Both the inner rotating sealing ring and the outer rotating sealing ring act on the inner body of the die head. (Comparison follows.) Figure 2 and Figure 3 The invention provides a clear visual indication of pressure changes and significantly reduces the pressure exerted by the molten plastic on the outer and inner rotating bodies, enabling the die head to operate smoothly and at high speeds.

[0017] The embodiments described above are merely preferred embodiments of the present invention, and not all feasible embodiments of the present invention. Any obvious modifications made by those skilled in the art without departing from the principles and spirit of the present invention should be considered to be included within the scope of protection of the claims of the present invention.

Claims

1. A high-speed rotating die head for plastic extrusion mesh, characterized in that, Includes rotary joint (1), housing (2), outer rotating body (3), inner rotating body (4), return oil pipe (5), oil tank (6), inlet oil pipe (7), machine head outer body (8), oil pump (9), motor (10), heat exchange oil pipe (11), lower bearing of inner rotating body (12), bearing seat (13); machine head inner body (14), upper bearing of inner rotating body (15), sealing ring of inner rotating body (16), sealing ring of outer rotating body (17); The rotary joint (1) is installed on the top of the inner rotating body (4). The bearing seat (13) is connected to the housing (2). The bottom of the housing is provided with the outer body (8), the inner body (14), the outer rotating body (3) and the inner rotating body (4) from the outside to the inside. The outer body (8) and the inner body (14) are connected to a plastic fluid cavity. The outer body (8) and the inner body (14) are connected to the housing. The upper and lower bearings (12) (15) of the inner rotating body are fixed on the inner rotating body (4). The bearing seat (13) is connected to the oil tank (6) through the return oil pipe (5). The oil tank (6) is connected to the oil pump (9) on the motor (10) through the heat exchange oil pipe (11). The oil pump (9) is connected to the rotary joint (1) through the oil inlet pipe (7). The bottom of the machine head is provided with an outer rotating body (3) and an inner rotating body (4) from the outside to the inside. Between the outer rotating body (3) and the inner rotating body (4), there are also an inner rotating body sealing ring (16), an outer rotating body sealing ring (17), an inner body of the machine head (14), and an outer body of the machine head (8). A material cavity is formed between the outer body of the machine head (8) and the inner body of the machine head (14). The inner rotating body sealing ring (16) is located at the bottom of the inner rotating body (4), the outer rotating body sealing ring (17) is located at the bottom of the outer rotating body (3), and both the inner rotating body sealing ring (16) and the outer rotating body sealing ring (17) act on the inner body of the machine head (14). The above-mentioned lubrication and cooling method for the high-speed rotating head of the plastic extrusion mesh is as follows: After the heat transfer oil in the oil tank (6) is cooled by the heat exchange oil pipe (11), the oil pump (9) driven by the motor (10) injects the heat transfer oil into the position of the lower bearing (12) of the inner rotating body at the bottom of the inner rotating body through the oil inlet pipe (7) and the rotary joint (1). Then, the oil flows from the inside of the inner rotating body (4) through the oil outlet hole to the cavity between the inner rotating body (4) and the inner body (14) of the head to lubricate the lower bearing (12) of the inner rotating body and cool the inner rotating body (4). Then, it returns to the top bearing seat (13) of the inner rotating body to lubricate the upper bearing (15) of the inner rotating body and returns to the oil tank (6) through the return oil pipe (5).

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