Helical tooth rotary extruder head

Abstract

The utility model relates to the technical field of cable sheaths, in particular to a spiral tooth rotary extrusion machine head which comprises a machine head main body and a transmission device, the machine head body comprises a machine core, a feeding flange arranged at the end, close to an extruder, of the machine core, an inner die arranged at the other end of the machine core and fixedly connected with the machine core, an outer die arranged outside the inner die in a sleeving mode, and a rotary lining fixedly arranged on the outer wall of the outer die, connected with the transmission device and used for driving the outer die to rotate. The machine core is provided with a feeding flow channel communicated with the feeding flange, a deviation adjusting sleeve used for adjusting the size of the flow channel is further arranged outside the machine core, a feeding port communicated with the flow channel is formed between the rotary lining and the inner mold, and the inner wall of the outer mold is provided with a tooth opening part used for forming a tooth shape. The utility model aims to enable the extruder head to realize the production of the helical tooth sheath and maintain the sealing property.

Description

Technical Field

[0001] The utility model relates to the technical field of cable sheaths, in particular to a spiral-tooth rotary extruder head. Background Art

[0002] In the cable manufacturing process, the extruder extrude the molten plastic or rubber raw materials through the die head, and forms the outer sheath of the cable through the inner and outer molds. In the actual manufacturing process, in order to take into account the friction coefficient and mechanical strength of the cable surface, a toothed structure will be designed on the surface of the cable sheath. At present, the extruder head can only produce vertically arranged toothed cable sheaths. With the increasing demand of the industry, the demand for cables with spiral tooth structures is gradually increasing. The teeth of such cables are spirally advanced, and the cable needs to be rotated and extruded during the production process to achieve the purpose of the surface tooth spiral. In view of this, there is an urgent need for an extruder head specifically for the production of spiral toothed cables. Utility Model Content

[0003] In order to solve the problems in the above background technology, the utility model provides a spiral tooth rotary extruder head.

[0004] The solution adopted by the utility model to solve its technical problems is: a spiral tooth rotary extruder head, including a head body and a transmission device, the head body including a movement, a feed flange arranged at one end of the movement close to the extruder, an inner mold arranged at the other end of the movement and fixedly connected to the movement, an outer mold sleeved to the outside of the inner mold, and a rotating bushing fixedly arranged on the outer wall of the outer mold and connected to the transmission device for driving the outer mold to rotate, the movement is provided with a feed flow channel connected to the feed flange, the outside of the movement is also provided with an adjustment sleeve for adjusting the flow channel size, a feed port connected to the flow channel is provided between the rotating bushing and the inner mold, and the inner wall of the outer mold is provided with a tooth mouth portion for forming a tooth shape.

[0005] By adopting the above technical solution, the fluidized rubber flows into the die head through the flange, and flows into the feed port of the outer mold rotating bushing through the flow channel carved on the core, and then enters the space between the inner mold and the outer mold for molding. The transmission device drives the rotating bushing to rotate, and also drives the outer mold fixedly connected to the rotating bushing to rotate, and the rubber flowing into the outer mold also rotates. The cable core passes through the inner mold, is covered by the rubber in the outer mold, and is extruded from the outer mold. The outer mold mouth is toothed, and the extruded cable is toothed, and the rotating teeth are spiral.

[0006] Furthermore, the transmission device includes a driving motor, a driving gear connected to the main shaft of the driving motor, and a driven gear fixedly connected to the rotating bushing, and a transmission chain is provided between the driving gear and the driven gear.

[0007] By adopting the above technical solution, the transmission chain is sleeved outside the driving gear and the driven gear, and the power of the motor is transmitted to the transmission chain through the driving gear, so that the rotation of the transmission chain drives the rotating bushing to rotate.

[0008] Furthermore, the drive motor is also provided with a speed regulator for controlling the speed of the drive motor, and the speed regulator is electrically connected to the drive motor.

[0009] By adopting the above technical solution, the die mouth rotates and the pitch between the sheath teeth is controlled according to the motor speed regulation.

[0010] Furthermore, a rotating gap with a width of 0.02 mm is provided between one end of the rotating bushing close to the feed port and the deviation adjusting sleeve.

[0011] By adopting the above technical solution, the bushing can be allowed to rotate and the material can be prevented from flowing out.

[0012] Furthermore, a rotary bearing is provided between the two sides of the rotary bushing and the deviation adjusting sleeve.

[0013] By adopting the above technical solution, the rotating bushing can be rotated relative to the deviation adjusting sleeve without deviation, and the sealed bearing can further seal the material to prevent the material from flowing out of the machine head.

[0014] Furthermore, a front pressure cover for fixing is provided between the outer mold and the rotating bushing.

[0015] By adopting the above technical solution, the bushing, the bearing and the outer mold can be pressed and fixed.

[0016] Furthermore, a cast aluminum heating ring for heating the rubber material is also provided outside the machine head body.

[0017] By adopting the above technical solution, the cast aluminum heating ring is the heating part of the machine head to maintain the temperature of the machine head.

[0018] In summary, the beneficial effects of the utility model are:

[0019] 1. The utility model sets a toothed portion on the outer mold, adds a rotating bushing to fix the outer mold, and then sets a driving motor to drive the rotating bushing and the outer mold to rotate through gears and a transmission chain, and the rubber material flowing into the outer mold also rotates, thereby forming spiral teeth outside the molding sleeve.

[0020] 2. The utility model provides a speed regulator to accurately control the rotation speed of the driving motor and the rotation speed of the outer mold to form different helical tooth moments.

[0021] 3. The utility model provides a 0.02 mm rotation gap between the rotating bushing and the deflection adjusting sleeve, which not only ensures the smooth rotation of the rotating bushing, but also effectively prevents the molten rubber from leaking from the gap, and further ensures the sealing by using the rotating bearing and the front pressure cover.

[0022] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of this embodiment;

[0024] In the figure: 1. Machine head body; 2. Transmission device; 21. Driving motor; 22. Driving gear; 23. Driven gear; 24. Transmission chain; 25. Speed ​​regulator; 3. Movement; 31. Feed channel; 4. Feed flange; 5. Inner mold; 6. Outer mold; 61. Tooth mouth; 7. Rotating bushing; 8. Adjustment sleeve; 9. Feed port; 10. Rotating gap; 11. Rotating bearing; 12. Front pressure cover; 13. Cast aluminum heating ring. DETAILED DESCRIPTION

[0025] In order to make the content of the utility model more clearly understood, the utility model is further described below based on specific embodiments in combination with the accompanying drawings.

[0026] It should be noted that the terms "center", "upper", "lower", "front", "back", "left", "right", "inner", "outer" and the like used herein to indicate directions or positional relationships are based on directions 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. Unless otherwise specified, "plurality" means two or more.

[0027] Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood by specific circumstances.

[0028] like Figure 1As shown, a spiral tooth rotary extruder head is connected to the extruder, wherein this embodiment includes a head body 1 and a transmission device 2, the head body 1 includes a core 3, a feed flange 4 arranged at one end of the core 3 close to the extruder, an inner mold 5 arranged at the other end of the core 3 and fixedly connected to the core 3, an outer mold 6 sleeved to the outside of the inner mold 5, and a rotating bushing 7 fixedly installed on the outer wall of the outer mold 6 and connected to the transmission device 2 for driving the outer mold 6 to rotate, a feed flow channel 31 connected to the feed flange 4 is provided on the core 3, and an adjustment sleeve 8 for adjusting the flow channel size is also provided outside the core 3, a feed port 9 connected to the flow channel is provided between the rotating bushing 7 and the inner mold 5, and a tooth mouth portion 61 is provided on the inner wall of the outer mold 6.

[0029] In this embodiment, a feed flange 4 is provided at the rear end of the movement 3. The molten rubber is injected into the machine head through the flange channel, evenly distributed through the precisely engraved flow channel on the movement 3, and then flows into the feed port 9 inside the rotating bushing 7 of the outer mold 6, enters the conical flow channel between the inner mold 5 and the outer mold 6, and then to the molding area for molding. The transmission device 2 drives the rotating bushing 7 to rotate, and also drives the outer mold 6 fixedly connected to the rotating bushing 7 to rotate, and the rubber flowing into the outer mold 6 also rotates. The cable core passes through the inner mold 5 and is pushed forward surrounded by the rubber inside the outer mold 6. When the rubber is extruded from the tooth mouth 61 of the outer mold 6 under the action of the rotating outer mold 6, a cable sheath with a toothed structure is formed. Since the outer mold 6 rotates continuously during the extrusion process, the surface of the extruded cable sheath presents a continuous and regular spiral tooth pattern.

[0030] like Figure 1 As shown, the transmission device 2 of this embodiment includes a driving motor 21 that can be driven to rotate, a driving gear 22 connected to the main shaft of the driving motor 21, and a driven gear 23 fixedly connected to the rotating bushing 7, and a transmission chain 24 is provided between the driving gear 22 and the driven gear 23. The driving motor 21 serves as a power source, and its main shaft is connected to the driving gear 22. When the motor is running, the main shaft drives the driving gear 22 to rotate. The driving gear 22 establishes a power transmission relationship with the driven gear 23 through the transmission chain 24. The transmission chain 24 is tightly sleeved on the outside of the driving gear 22 and the driven gear 23. When the driving gear 22 rotates, the chain also moves. The chain transmits the rotational kinetic energy of the driving gear 22 to the driven gear 23 through meshing with the driven gear 23, so that the driven gear 23 also starts to rotate. Because the driven gear 23 is fixedly connected to the rotating bushing 7, when the driven gear 23 rotates, it drives the rotating bushing 7 and the outer mold 6 sleeved outside the rotating bushing 7 to rotate together.

[0031] Specifically, the drive motor 21 of this embodiment is further provided with a speed regulator 25 for controlling the speed of the drive motor 21, and the speed regulator 25 is electrically connected to the drive motor 21. The speed of the drive motor 21 is precisely adjusted by the speed regulator 25 electrically connected to the drive motor 21. According to actual production requirements, the speed of the drive motor 21 can be adjusted in real time, thereby achieving effective control of the upper pitch and pitch parameters of the helical toothed sheath, so as to produce helical toothed cable sheaths with different thread densities.

[0032] In this embodiment, a rotation gap 10 with a width of 0.02 mm is provided between the end of the rotating bushing 7 close to the feed port 9 and the deflection adjusting sleeve 8. By providing a rotation gap 10 with a width of 0.02 mm between the end of the rotating bushing 7 close to the feed port 9 and the deflection adjusting sleeve 8, it is ensured that the rotating bushing 7 can rotate smoothly without hindrance, thereby driving the outer mold 6 to rotate, and the gap with a width of only 0.02 mm can prevent the rubber from flowing out.

[0033] like Figure 1 As shown, in this embodiment, a rotary bearing 11 is further provided between the two sides of the rotary bushing 7 and the deflection adjusting sleeve 8. The rotary bearings 11 on both sides can provide a stable support and rotation base for the rotary bushing 7, ensuring that the bushing can maintain a precise axial position during the rotation process and will not be offset due to centrifugal force and other reasons, thereby ensuring the uniformity of the spiral toothed product. It can also prevent wear caused by direct contact between the rotary bushing 7 and the deflection adjusting sleeve 8. The design of the sealed bearing can effectively prevent the molten material from leaking from the gap between the rotary bushing 7 and the deflection adjusting sleeve 8, preventing the rubber from overflowing from the outside of the machine head.

[0034] like Figure 1 As shown, a front pressure cap 12 for fixing is further provided between the outer mold 6 and the rotating bushing 7 of this embodiment. The front pressure cap 12 can effectively press and fix the rotating bushing 7 and the bearing, and prevent the bushing and the bearing from loosening or deviating due to external force or self-gravity during the operation of the extruder, so as to ensure its stable rotation. It can also play a sealing role to prevent the molten material from leaking from the gap between the bushing and the outer mold 6 and the bearing.

[0035] like Figure 1 As shown, in this embodiment, a cast aluminum heating ring 13 for heating the rubber material is also provided outside the die body 1. The cast aluminum heating ring 13 is evenly distributed around the outer wall of the die body 1, and can provide stable heat to ensure that the rubber material can be evenly and fully heated to the ideal working temperature before extrusion, so as to achieve good fluidity of the rubber material.

[0036] In summary, the beneficial effects of this embodiment are as follows: this embodiment designs a toothed portion 61 on the inner wall of the outer mold 6, and then adds a rotating bushing 7 to fix the outer mold 6, and then the driving motor 21 drives the rotating bushing 7 and the outer mold 6 to rotate through gear transmission and chain. When the molten rubber is poured into and contacts the rotating outer mold 6, the rubber shapes spiral tooth patterns on the outside of the sheath as it rotates with the outer mold 6. A speed regulator 25 is provided to accurately control the rotation speed of the driving motor 21 to adjust the rotation speed of the outer mold 6, which can meet the production requirements of spiral toothed sheaths with different pitches. A tiny rotating gap 10 of 0.02 mm is set between the rotating bushing 7 and the deflection adjustment sleeve 8, which not only ensures the smooth rotation of the rotating bushing 7, but also effectively prevents the leakage of the molten rubber from the gap, and further ensures the sealing by using the rotating bearing 11 and the front pressure cover 12.

[0037] The embodiments described above are only preferred implementation modes of the present utility model and cannot be used to limit the protection scope of the present utility model. Any non-substantial changes and modifications made by technicians in this field on the basis of the utility model shall fall within the protection scope of the present utility model.

Claims

1. A spiral tooth rotary extruder head, characterized in that: It includes a head body and a transmission device, the head body includes a movement, a feed flange arranged at one end of the movement close to the extruder, an inner mold arranged at the other end of the movement and fixedly connected to the movement, an outer mold sleeved to the outside of the inner mold, and a rotating bushing fixedly arranged on the outer wall of the outer mold and connected to the transmission device for driving the outer mold to rotate, the movement is provided with a feed flow channel connected to the feed flange, the outside of the movement is also provided with an adjustment sleeve for adjusting the flow channel size, a feed port connected to the flow channel is provided between the rotating bushing and the inner mold, and the inner wall of the outer mold is provided with a tooth mouth portion for forming a tooth shape.

2. A spiral tooth rotary extruder head according to claim 1, characterized in that: The transmission device comprises a driving motor, a driving gear connected to the main shaft of the driving motor and a driven gear fixedly connected to the rotating bushing, and a transmission chain is arranged between the driving gear and the driven gear.

3. A spiral tooth rotary extruder head according to claim 2, characterized in that: The drive motor is also provided with a speed regulator for controlling the speed of the drive motor, and the speed regulator is electrically connected to the drive motor.

4. A spiral tooth rotary extruder head according to claim 3, characterized in that: A rotating gap with a width of 0.02 mm is also provided between the end of the rotating bushing close to the feed port and the deviation adjusting sleeve.

5. A spiral tooth rotary extruder head according to claim 4, characterized in that: Rotary bearings are also provided between the two sides of the rotary bushing and the deviation adjusting sleeve.

6. A spiral tooth rotary extruder head according to claim 5, characterized in that: A front pressure cover for fixing is also arranged between the outer mold and the rotating bushing.

7. A spiral tooth rotary extruder head according to claim 6, characterized in that: A cast aluminum heating ring for heating the rubber material is also arranged outside the machine head body.

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