A PVC extrusion molding tool for wire surface

Abstract

The present invention discloses a tool for extruding and molding PVC on the surface of an electric wire, comprising a workbench, an insulation shell, a transmission mechanism, and an extrusion tube assembly, wherein the insulation shell is fixed on the workbench; the extrusion tube assembly comprises a rotating drum, a wire feed pipe, a feed pipe, and a feed drum, wherein the rotating drum is rotatably mounted on the insulation shell, the rotating drum rotates along its axis, the wire feed pipe is rotatably mounted on the rotating drum, and a material storage space is formed between the rotating drum and the rotating drum, the axis of rotation of the wire feed pipe relative to the rotating drum coincides with the axis of rotation of the rotating drum relative to the insulation shell, the wire feed pipe extends out of both ends of the insulation shell, the feed drum is rotatably mounted on the rotating drum and communicates with the material storage space, the axis of rotation of the feed pipe relative to the rotating drum coincides with the axis of rotation of the rotating drum relative to the insulation shell, the feed pipe is communicated with one end of the feed drum, and a discharge port is formed between the end of the rotating drum away from the feed pipe and the wire feed pipe; the transmission mechanism is used to drive the rotating drum to rotate. The present invention has a simple structure, ensures the uniformity of the PVC layer on the outer surface of the electric wire, and ensures its good performance.

Description

Technical Field

[0001] The present invention relates to the technical field of wire processing equipment, in particular to a wire surface layer PVC extrusion molding tool. Background Art

[0002] During the wire processing process, the surface PVC needs to be extruded through an extruder, and the molten PVC needs to be extruded through a die onto the twisted wire core. A general plastic extruder heats and melts the material into a viscous flow state, and with the help of the extrusion action of the screw, pushes the viscous flow material through the die to form a continuous body with a cross-section similar to the shape of the die. Generally, during the wire processing process, the horizontal wire is inserted into the wire inlet pipe, and then the molten PVC in the material space is squeezed out of the discharge port and coated on the outside of the wire core. In this way, due to the influence of the molten PVC's own gravity and uneven heating, the density of the molten PVC at different positions is different. Therefore, there are certain differences in the thickness or strength of the PVC layer coated on the outside of the wire, resulting in certain differences in the performance of the wire. Summary of the Invention

[0003] In order to solve the technical problems existing in the background technology, the present invention proposes a wire surface PVC extrusion molding tool.

[0004] The present invention provides a wire surface PVC extrusion molding tool, comprising a workbench, an insulation shell, a transmission mechanism, and an extrusion tube assembly, wherein:

[0005] The insulation shell is fixed on the workbench, and the insulation shell has an insulation zone;

[0006] The extrusion tube assembly includes a rotating cylinder, an inlet pipe, a feed pipe and a feed cylinder. The rotating cylinder is rotatably mounted on the heat-insulating shell. The rotating cylinder rotates along its axis, and the rotating cylinder is located in the heat-insulating zone. The inlet pipe is rotatably mounted on the rotating cylinder and a material storage space is formed between the rotating cylinder. The axis of rotation of the inlet pipe relative to the rotating cylinder coincides with the axis of rotation of the rotating cylinder relative to the heat-insulating shell. The inlet pipe extends out of both ends of the heat-insulating shell. The feed cylinder is rotatably mounted on the rotating cylinder and communicates with the material storage space. The axis of rotation of the feed cylinder relative to the rotating cylinder coincides with the axis of rotation of the rotating cylinder relative to the heat-insulating shell. The feed pipe is communicated with one end of the feed cylinder, and a discharge port is formed between the end of the rotating cylinder away from the feed pipe and the inlet pipe.

[0007] The transmission mechanism is arranged on the heat-insulating shell and is used for driving the rotating drum to rotate.

[0008] As a further optimized solution of the present invention, the feed cylinder is coaxially sleeved on the outside of the wire inlet pipe, and the feed cylinder and the wire inlet pipe are fixedly connected, and the wire inlet pipe extends out of both ends of the feed cylinder.

[0009] As a further optimized solution of the present invention, a plurality of leakage holes are opened on the side wall of the feeding barrel along its circumference.

[0010] As a further optimized solution of the present invention, multiple groups of stirring rods are provided on the inner wall of the rotating cylinder.

[0011] As a further optimized solution of the present invention, multiple groups of extrusion tube assemblies are provided.

[0012] As a further optimized solution of the present invention, the feed barrels of multiple groups of extrusion tube assemblies are coaxially distributed in the insulation shell.

[0013] As a further optimized solution of the present invention, the transmission mechanism includes a rotating shaft, a driving gear and a plurality of driven gears. The rotating shaft is rotatably mounted on the insulation shell, and the axis of the rotating shaft coincides with the axis of the rotating cylinder. The driving gear is mounted on the rotating shaft, and the plurality of driven gears are respectively mounted on the rotating cylinders of the plurality of extrusion tube assemblies, and the driving gear and the driven gears are engaged with each other.

[0014] As a further optimized solution of the present invention, a driving mechanism is further provided on the workbench, and the driving mechanism is used to drive the rotating shaft to rotate.

[0015] As a further optimized solution of the present invention, the heat-insulating shell includes a shell and a heating wire, and the heating wire is wound around the inner wall of the shell.

[0016] In the present invention, the proposed wire surface PVC extrusion molding tool has a simple structure. The transmission mechanism drives the rotating drum to rotate, thereby ensuring that the molten PVC in the material storage space formed between the rotating drum and the wire inlet pipe is heated more evenly in the insulation shell, and preventing the molten PVC from settling under its own gravity so that the density at the bottom is high, thereby ensuring that the density of the molten PVC coated on the wire core is equal, thereby ensuring the uniformity of the PVC layer on the outside of the wire and ensuring its good performance.

[0017] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention;

[0019] Figure 2 This is the main view of the present invention;

[0020] Figure 3 It is an AA cross-sectional view of the present invention. DETAILED DESCRIPTION

[0021] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention, and are not to be construed as limiting the present invention.

[0022] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0024] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0025] In the present invention, unless otherwise specified and limited, the first feature "above" or "below" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium.

[0026] "Above," "above," and "above" may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. "Below," "below," and "below" a first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0027] like Figure 1-3 The tooling shown is a wire surface PVC extrusion molding tool, comprising a workbench 1, an insulation shell 2, a transmission mechanism, and an extrusion tube assembly 3, wherein:

[0028] The heat-insulating shell 2 includes a shell 20 and a heating wire 21. The heating wire 21 is wound around the inner wall of the shell 20. The shell 20 is fixed on the workbench 1. The heat-insulating shell 2 has a heat-insulating zone.

[0029] The extrusion tube assembly 3 includes a rotating cylinder 30, an inlet pipe 31, a feed pipe 32 and a feed cylinder 33. The rotating cylinder 30 is rotatably mounted on the insulation shell 2 through a bearing. The rotating cylinder 30 rotates along its axis, and the rotating cylinder 30 is located in the insulation zone. The inlet pipe 31 is rotatably mounted on the rotating cylinder 30 and a material storage space 4 is formed between the rotating cylinder 30. The axis of rotation of the inlet pipe 31 relative to the rotating cylinder 30 coincides with the axis of rotation of the rotating cylinder 30 relative to the insulation shell 2. The inlet pipe 31 extends out of both ends of the insulation shell 2. The feed cylinder 33 is rotatably mounted on the rotating cylinder 30 and connected to the material storage space 4. The axis of rotation of the feed cylinder 33 relative to the rotating cylinder 30 coincides with the axis of rotation of the rotating cylinder 30 relative to the insulation shell 2. The feed pipe 32 is connected to one end of the feed cylinder 33. A discharge port 300 is formed between the end of the rotating cylinder 30 away from the feed pipe 32 and the inlet pipe 31. Specifically, the feed cylinder 33 is coaxially sleeved on the outside of the inlet pipe 31, and the feed cylinder 33 is fixedly connected to the inlet pipe 31. The inlet pipe 31 extends out of both ends of the feed cylinder 33. A plurality of leakage holes 330 are opened on the side wall of the feed cylinder 33 along its circumference. The feed cylinder 33 is rotatably mounted on the rotating cylinder 30 through a bearing.

[0030] The transmission mechanism is provided on the heat-insulating shell 2 and is used to drive the rotating drum 30 to rotate;

[0031] There are three groups of extrusion tube assemblies 3 , and the feed barrels 33 of the three groups of extrusion tube assemblies 3 are coaxially distributed in the heat-insulating shell 2 .

[0032] The transmission mechanism includes a rotating shaft 6, a driving gear 7 and a plurality of driven gears 8. The rotating shaft 6 is rotatably mounted on the insulation shell 2, and the axis of the rotating shaft 6 coincides with the axis of the rotating cylinder 30. The driving gear 7 is mounted on the rotating shaft 6, and the plurality of driven gears 8 are respectively mounted on the rotating cylinders 30 of the plurality of extrusion tube assemblies 3. The driving gear 7 and the driven gear 8 are engaged with each other. A driving mechanism 9 is also provided on the workbench 1. The driving mechanism 9 is a reduction motor. The output shaft of the reduction motor is connected to the rotating shaft 6 to drive the rotating shaft 6 to rotate.

[0033] The inner wall of the rotating cylinder 30 is provided with multiple groups of stirring rods 5 .

[0034] During the operation of this embodiment: the electric wire core passes through the middle of the inlet pipe 31, the discharge end of the extruder is connected to the feed pipe 32, the molten PVC enters the feed barrel 33 through the feed pipe 32, and enters the material storage space 4 through the leakage hole 330. During this process, the driving mechanism 9 drives the rotating shaft 6 to rotate, and the rotating shaft 6 drives the rotating barrel 30 of the multiple groups of extrusion tube assemblies 3 to rotate through the driving gear 7 and the driven gear 8, thereby driving the molten PVC located in the material storage space 4 to rotate and stir it through the stirring rod 5, so that the molten PVC is heated evenly and the centrifugal force can prevent the molten PVC from sealing differently at different positions due to its own gravity. Finally, the molten PVC is discharged from the discharge port 300 and coated on the outside of the electric wire core.

[0035] In this embodiment, the feed barrel 33 is preferably coaxially sleeved on the outside of the inlet pipe 31, and the feed barrel 33 is fixedly connected to the inlet pipe 31. The inlet pipe 31 extends out of both ends of the feed barrel 33. The feed barrel 33 is installed on the rotating barrel 30 through bearings, which facilitates the installation of the extrusion molding tooling.

[0036] In order to make the distribution of the molten PVC in the material holding space 4 more uniform during the feeding process, it is preferred in this embodiment that a plurality of leakage holes 330 are opened on the side wall of the feeding cylinder 33 along its circumference.

[0037] In order to increase the uniformity of the molten PVC in the material holding space 4 , in this embodiment, it is preferred that a plurality of groups of stirring rods 5 are provided on the inner wall of the rotating cylinder 30 .

[0038] In order to increase the efficiency of processing the surface of the wire, it is preferred in this embodiment that multiple groups of extrusion tube assemblies 3 are provided.

[0039] In order to ensure that the temperature of the molten PVC in each group of extrusion tube assemblies 3 is the same, in this embodiment, preferably, the feed barrels 33 of the multiple groups of extrusion tube assemblies 3 are coaxially distributed in the insulation shell 2.

[0040] Specifically in this embodiment, the transmission mechanism includes a rotating shaft 6, a driving gear 7 and a plurality of driven gears 8. The rotating shaft 6 is rotatably mounted on the insulation shell 2, and the axis of the rotating shaft 6 coincides with the axis of the rotating cylinder 30. The driving gear 7 is mounted on the rotating shaft 6, and the plurality of driven gears 8 are respectively mounted on the rotating cylinders 30 of the multiple groups of extrusion tube assemblies 3. The driving gear 7 and the driven gear 8 are engaged with each other, which can realize the synchronous rotation of the rotating cylinders 30 of the multiple groups of extrusion tube assemblies 3.

[0041] Specifically in this embodiment, a driving mechanism 9 is further provided on the workbench 1 . The driving mechanism 9 is a reduction motor. The output shaft of the reduction motor is connected to the rotating shaft 6 to drive the rotating shaft 6 to rotate.

[0042] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A wire surface PVC extrusion molding tool, characterized in that: It comprises a workbench (1), a heat-insulating shell (2), a transmission mechanism, and an extrusion tube assembly (3), wherein: The heat-insulating shell (2) is fixed on the workbench (1), and the heat-insulating shell (2) has a heat-insulating zone; The extrusion tube assembly (3) includes a rotating cylinder (30), an inlet pipe (31), a feed pipe (32) and a feed cylinder (33). The rotating cylinder (30) is rotatably mounted on the heat-insulating shell (2). The rotating cylinder (30) rotates along its axis, and the rotating cylinder (30) is located in the heat-insulating zone. The inlet pipe (31) is rotatably mounted on the rotating cylinder (30) and forms a material storage space (4) with the rotating cylinder (30). The axis of rotation of the inlet pipe (31) relative to the rotating cylinder (30) and the axis of rotation of the rotating cylinder (30) relative to the heat-insulating shell are aligned. (2) The axes of rotation coincide with each other, the inlet pipe (31) extends out of both ends of the heat-insulating shell (2), the feed cylinder (33) is rotatably mounted on the rotating cylinder (30) and is in communication with the material storage space (4), the axis of rotation of the feed cylinder (33) relative to the rotating cylinder (30) coincides with the axis of rotation of the rotating cylinder (30) relative to the heat-insulating shell (2), the feed pipe (32) is in communication with one end of the feed cylinder (33), and a discharge port (300) is formed between the end of the rotating cylinder (30) away from the feed pipe (32) and the inlet pipe (31); The transmission mechanism is provided on the heat-insulating shell (2) and is used to drive the rotating drum (30) to rotate; The inner wall of the rotating cylinder (30) is provided with a plurality of stirring rods (5); The extrusion tube assembly (3) is provided with multiple groups; the transmission mechanism includes a rotating shaft (6), a driving gear (7) and multiple driven gears (8); the rotating shaft (6) is rotatably mounted on the heat-insulating shell (2), and the axis of the rotating shaft (6) coincides with the axis of the rotating cylinder (30); the driving gear (7) is mounted on the rotating shaft (6), and the multiple driven gears (8) are respectively mounted on the rotating cylinders (30) of the multiple groups of extrusion tube assemblies (3); the driving gear (7) and the driven gears (8) are meshed with each other; the workbench (1) is also provided with a driving mechanism (9), and the driving mechanism (9) is used to drive the rotating shaft (6) to rotate; The feed cylinder (33) is coaxially sleeved on the outside of the wire inlet pipe (31), and the feed cylinder (33) is fixedly connected to the wire inlet pipe (31), and the wire inlet pipe (31) extends out of both ends of the feed cylinder (33); A plurality of leakage holes (330) are formed on the side wall of the feeding cylinder (33) along its circumference.

2. The wire surface layer PVC extrusion molding tool according to claim 1, characterized in that: The heat-insulating shell (2) comprises a shell (20) and a heating wire (21), wherein the heating wire (21) is wound around the inner wall of the shell (20).

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