Cable core pultrusion equipment and cable core manufactured by using same

Abstract

The invention discloses a cable core pultrusion device and a cable core manufactured by using the same, the pultrusion device at least comprises: a first curing mold for pre-curing carbon fiber yarns which are impregnated and extend along the axial direction to form a cable core inner layer; the second curing mold is used for covering the outer part of the inner layer of the cable core with the glass fiber yarns which are subjected to gum dipping and yarn guiding and extend along the axial direction, and finally curing the yarns of which the inner layer and the outer layer extend along the axial direction to form the whole cable core; the adjusting frame is arranged at the front end of the second curing mold, and the inner-layer carbon fiber and the outer-layer glass fiber to be finally cured are kept concentric through two V-shaped pressing wheels which are arranged up and down and are adjustable in position and a yarn guide groove formed in an inlet of the second curing mold. The cable core with inner-layer carbon fiber straight yarn and outer-layer glass fiber straight yarn extending in the axial direction can be prepared, and concentricity of the inner-layer straight yarn and the outer-layer straight yarn and uniform distribution of the outer-layer straight yarn can be effectively guaranteed through the adjusting frame and the yarn guide groove in the inlet position of the second curing mold.

Description

Technical Field

[0001] The present invention relates to the technical field of cable core production equipment, in particular to a cable core pultrusion device and a cable core manufactured by using the device. Background Art

[0002] The existing cable core pultrusion process uses an inner layer of 0° straight carbon fiber yarn (i.e., the carbon fiber yarn extends axially) and an outer layer of 90° wrapped glass fiber yarn (i.e., the glass fiber yarn extends radially and is twisted). Because the outer layer of wrapped yarn is at a 90° angle to the cable core's axial direction, the 90° yarn's contribution to the cable core's tensile strength is almost zero, significantly reducing the overall tensile strength of the cable core.

[0003] Chinese patent application CN103093897A discloses a method for making a cable core, comprising the following steps: leading carbon fibers from a creel and dipping them in a first dipping zone, wherein the epoxy resin used is a heat-resistant epoxy resin with high mechanical properties; after dipping, the carbon fibers enter a first curing furnace for pre-curing to produce a carbon fiber composite core with a diameter of 5 mm to 12 mm, and the temperature is adjusted so that the curing degree reaches more than 85%; the glass fibers on both sides are led out and respectively enter a second dipping zone and a third dipping zone for dipping, wherein the epoxy resin used is a high-temperature-resistant and weather-resistant epoxy resin; after dipping, the glass fibers are wrapped around the outer layer of the carbon fiber core in a winding zone, with a single-side thickness of 0.5 mm to 2 mm, and the winding speed is controlled by a servo motor and synchronized with the pultrusion speed; the carbon fiber composite core and the glass fiber protective layer are composited and passed through a second curing furnace together, and the temperature is adjusted so that both are fully cured; the composite cable core product passes through a traction machine and is collected at a reel.

[0004] From the above disclosed contents of the prior art, it can be judged that when adopting the cable core manufacturing technology concept of "outer layer winding", the overall tensile strength of the cable core can only rely on the tensile strength of the inner core, and the outer layer of glass fiber layer cannot play any role in improving the tensile strength.

[0005] Therefore, there is an urgent need for a cable core pultrusion equipment that adopts different cable core production technology concepts so that the extension direction of the outer layer of glass fiber and the inner layer of carbon fiber core are parallel, which can not only effectively improve the overall tensile strength of the cable core, but also ensure the concentricity of the inner and outer layers during the production process and improve the impregnation effect.

[0006] The information disclosed in this background technology section is only intended to enhance understanding of the overall background of the invention and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the Invention

[0007] The object of the present invention is to provide a cable core pultrusion device, through which a cable core can be prepared in which the inner layer of carbon fiber straight yarns and the outer layer of glass fiber straight yarns both extend axially, and the concentricity of the inner and outer layer straight yarns and the uniform distribution of the outer layer straight yarns can be effectively ensured by adjusting the guide grooves at the entrance position of the adjustment frame and the second curing mold.

[0008] Another object of the present invention is to provide a cable core pultrusion device, which can not only promote fiber opening, but also effectively improve the wetting effect of resin into the yarn through the ultrasonic oscillation function of the dipping tank and the structure and arrangement of the yarn guide roller in the dipping tank.

[0009] To achieve the above-mentioned purpose, according to the first aspect of the present invention, the present invention provides a cable core pultrusion equipment, which at least includes: a first curing mold, which pre-cures the carbon fiber yarn extending axially after being dipped in glue to form the inner layer of the cable core; a second curing mold, which covers the glass fiber yarn extending axially after being dipped in glue and guided on the outside of the inner layer of the cable core, and finally cures the yarns extending axially in both the inner and outer layers to form the cable core as a whole; an adjusting frame, which is arranged at the front end of the second curing mold, and keeps the inner layer of carbon fiber and the outer layer of glass fiber to be finally cured concentric through two V-shaped pressure wheels arranged upper and lower and adjustable in position and a yarn guide groove arranged at the entrance of the second curing mold.

[0010] Furthermore, in the above technical solution, two V-shaped pressure wheels can clamp the pre-cured inner layer of carbon fiber therebetween, and the V-shaped pressure wheels are respectively arranged on the pressure wheel mounting plates. Four groups of adjustment bolts can be respectively provided around the pressure wheel mounting plates for adjusting the upper, lower, left and right positions of the two V-shaped pressure wheels.

[0011] Furthermore, in the above technical solution, the yarn guide grooves may be blade-shaped at the entrance of the second curing mold and extend radially, and may be evenly and continuously arranged.

[0012] Furthermore, in the above technical solution, the pressure wheel mounting plate can also be used as a yarn threading plate. The number and setting positions of the yarn threading holes on the yarn threading plate are adapted to the yarn guide groove, and can be used to limit the movement of the outer layer of glass fiber yarn under the action of tension, so that the outer layer of glass fiber is evenly coated on the outside of the inner layer of carbon fiber, and the inner and outer layers are kept concentric.

[0013] Furthermore, in the above technical solution, a first dipping tank is provided at the front end of the first curing mold, and a second dipping tank is provided at the front end of the second curing mold. Ultrasonic generators can be provided at the bottom of the first dipping tank and the second dipping tank to provide ultrasonic oscillation effect for the resin glue in the dipping tank, thereby promoting yarn opening and increasing the kinetic energy of the resin molecules.

[0014] Furthermore, in the above technical solution, multiple first yarn guide rollers can be arranged at intervals in the first dipping tank and the second dipping tank, and the multiple first yarn guide rollers are wavy as a whole, which are used to extend the residence time of the yarn in the dipping tank and change the direction of the yarn.

[0015] Furthermore, in the above technical solution, the outer edge of the first yarn guide roller may be serrated with concave and convex portions at intervals, so that the yarn tension at the concave and convex positions is different, thereby improving the wetting effect of the resin glue on the yarn.

[0016] Furthermore, in the above technical solution, a tension control unit may be provided at the front end of the second dipping tank to individually control the tension of each glass fiber straight yarn in the outer layer to ensure that the elongation of the outer layer glass fiber is compatible with the breaking elongation of the inner layer carbon fiber.

[0017] Furthermore, in the above technical solution, the tension control unit may include a coaxially arranged magnetic powder brake and a damping roller, two second guide rollers are symmetrically provided at the lower part of the damping roller, and the direction of the glass fiber straight yarn passing through the damping roller and the second guide roller may be Ω-shaped.

[0018] Furthermore, in the above technical solution, the carbon fiber yarn and the glass fiber yarn can be stored and supplied by the carbon fiber creel and the glass fiber creel respectively, and corresponding tension can be provided.

[0019] Furthermore, in the above technical solution, a first threading plate may be provided at the point where the two strands of carbon fiber yarn converge, and at both the front and rear ends of the first dipping tank. The threading holes on the first threading plate may be arranged as a whole in a rectangular shape. A second threading plate may be provided at the front end of the first curing mold, and the threading holes on the second threading plate may be arranged as a whole in a circular shape. A third threading plate may be provided at the front end of the adjustment frame, at the position before the two strands of glass fiber yarn converge, and the threading holes on the third threading plate may be arranged as a whole in two arcs.

[0020] Furthermore, in the above technical solution, the rear end of the second curing mold may be provided in sequence with: a traction crawler, which is used to pull the finally cured cable core product out of the second curing mold; a cutting machine, which is used to cut according to the needs of the cable core product; and a winding machine, which is used to wind up the cut cable core product.

[0021] According to a second aspect of the present invention, the present invention provides a cable core, which is prepared using any one of the aforementioned pultrusion devices.

[0022] Furthermore, in the above technical solution, the cable core comprises an inner layer of carbon fiber and an outer layer of glass fiber, with both the carbon fiber yarn and the glass fiber yarn extending axially. The carbon fiber has an elongation at break of 1.7%, while the glass fiber has an elongation at break of 3%. During tension control before curing the glass fiber, the elongation of the glass fiber can be adjusted to 1.3%.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1) The present invention is an improvement on the existing cable core layer structure and the pultrusion equipment used therein, solving the problem that the existing outer layer 90° yarns hardly contribute to the overall tensile strength of the cable core, thereby greatly increasing the overall tensile strength of the cable core. The cable core of the present invention, both in terms of the product and the pultrusion equipment used to obtain the product, is completely different from the technical concept of the prior art scheme. It can produce a cable core in which the inner layer of carbon fiber straight yarns and the outer layer of glass fiber straight yarns both extend axially (i.e., both the inner and outer layers are 0° straight yarns). It can not only effectively ensure the concentricity of the inner and outer layers of straight yarns, but also promote fiber opening during the dipping process and effectively improve the wetting effect of the resin into the yarn interior.

[0025] 2) The present invention uses a first curing die to pre-cure the inner carbon fiber layer, an adjustment frame to adjust the position of the outer glass fiber layer so that it remains concentric with the inner carbon fiber layer, and a yarn guide groove at the entrance of the second curing die to ensure a more uniform arrangement of the outer yarns. The final curing of the outer and inner carbon fiber layers is completed in the second curing die, thereby achieving axial extension of the straight yarns of the inner and outer carbon fibers and ensuring product quality. Experiments have shown that the tensile strength of cable cores produced using the pultrusion equipment of the present invention is significantly improved.

[0026] 3) The adjusting frame and the yarn guide groove of the present invention have a synergistic effect. By adjusting the radial position of the inner carbon fiber layer by the adjusting frame, the inner carbon fiber layer can be aligned with the second curing mold; the yarn guide groove is under the action of the tension of the outer glass fiber yarn, which can further limit the movement of the yarn, ensuring that the outer glass fiber layer can evenly and completely cover the inner carbon fiber layer, thereby ensuring the insulation of the cable core; under the synergistic effect of the two, the finally cured inner carbon fiber layer and outer glass fiber layer can remain concentric and ensure that the outer glass fiber layer is covered more evenly, thereby improving the quality of the finished cable core;

[0027] 4) The resin dipping tank of the present invention uses an ultrasonic generator to promote yarn opening during the oscillation process and increase the kinetic energy of the resin molecules, thereby accelerating the resin from penetrating into the yarn. The plurality of first yarn guide rollers arranged in a wavy shape can effectively extend the residence time of the yarn in the resin dipping tank and change the yarn direction, thereby improving the yarn wetting effect. The outer edge of the first yarn guide roller is configured as a serrated shape with concave and convex intervals, so that the yarn tension at the concave and convex positions is different, which can further improve the resin wetting effect on the yarn.

[0028] 5) The present invention can adjust the tension of each glass fiber yarn through a tension control unit. The overall direction of the glass fiber straight yarn after passing through the damping roller and the second guide roller is Ω-shaped, and the tension of each outer layer of glass fiber straight yarn is individually controlled, which is conducive to controlling the uniform content of the finished yarn. Experiments have shown that when the breaking elongation of the inner layer carbon fiber is 1.7%, before the final solidification of the finished product, the elongation of the outer layer glass fiber is adjusted to about 1.3%, which has the best effect and can maximize the tensile strength of the finished cable core.

[0029] 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 and to implement it according to the contents of the specification, and to make the above and other purposes, technical features and advantages of the present invention easier to understand, one or more preferred embodiments are listed below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the cable core structure in the prior art.

[0031] Figure 2 It is a schematic diagram of the cable core structure of the present invention.

[0032] Figure 3 It is a schematic diagram of the connection structure of the cable core pultrusion equipment of the present invention.

[0033] Figure 4 It is a structural schematic diagram of the first dipping tank and the second dipping tank in the cable core pultrusion equipment of the present invention.

[0034] Figure 5 It is a structural schematic diagram of the first yarn guide roller in the dipping tank of the present invention.

[0035] Figure 6 It is a structural schematic diagram of the adjustment frame in the cable core pultrusion equipment of the present invention.

[0036] Figure 7 This is a schematic diagram of the structure of the guide groove where the outer glass fiber of the cable core of the present invention passes through the entrance of the second curing mold (the adjustment frame is not shown).

[0037] Figure 8 It is a schematic diagram of the yarn guide groove structure at the entrance of the second curing mold of the present invention.

[0038] Figure 9 It is a structural schematic diagram of the tension control unit of the present invention.

[0039] Figure 10 It is a structural schematic diagram of the first yarn threading plate of the present invention.

[0040] Figure 11 It is a structural schematic diagram of the second yarn threading plate of the present invention.

[0041] Figure 12 It is a structural schematic diagram of the third yarn threading plate of the present invention.

[0042] Description of main reference numerals:

[0043] A1-carbon fiber yarn in the prior art, B1-glass fiber yarn in the prior art; A-carbon fiber yarn of the present invention, B-glass fiber yarn of the present invention;

[0044] 1-first curing mold, 2-second curing mold, 21-yarn guide groove, 3-adjusting frame, 31-first V-type pressure wheel, 32-second V-type pressure wheel, 33-adjusting bolt group, 4-first dipping tank, 41-first guide roller, 42-ultrasonic generator, 43-resin, 5-second dipping tank, 6-tension control unit, 61-magnetic powder brake, 62-damping roller, 63-second guide roller, 7-carbon fiber creel, 8-glass fiber creel, 9-first threading plate, 91-first threading hole, 10-second threading plate, 101-second threading hole, 11-third threading plate, 111-third threading hole, 12-traction crawler, 13-cutting machine, 14-winding machine. DETAILED DESCRIPTION

[0045] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0046] Unless expressly stated otherwise, throughout the specification and claims, the term “comprise” or variations such as “include” or “comprising” will be understood to include the stated elements or components but not to exclude other elements or components.

[0047] In this document, for ease of description, spatially relative terms such as "below," "beneath," "down," "above," "above," etc. may be used to describe the relationship of one element or feature to another element or feature in the accompanying drawings. It should be understood that the spatially relative terms are intended to encompass different orientations of an object in use or operation in addition to the orientation depicted in the drawings. For example, if the object in the figure is turned over, the element described as being "below" or "below" other elements or features will be oriented "above" the element or feature. Therefore, the exemplary term "below" can include both below and above directions. Objects may also have other orientations (rotated 90 degrees or other orientations) and the spatially relative terms used herein should be interpreted accordingly.

[0048] In this document, the terms "first", "second", etc. are used to distinguish two different elements or parts, and are not used to limit specific positions or relative relationships. In other words, in some embodiments, the terms "first", "second", etc. can also be interchangeable with each other.

[0049] The present invention is directed to the existing cable core layer structure (reference Figure 1 , that is, the inner layer 0° carbon fiber straight yarn A1 + outer layer 90° glass fiber winding yarn B1) and the corresponding pultrusion equipment used in the production process are improved. The problem that the outer layer 90° yarn has almost no contribution to the overall tensile strength of the cable core is solved, and the overall tensile strength of the cable core is greatly increased. The cable core of the present invention is completely different from the technical concept of the prior art in terms of both the product and the pultrusion equipment used to obtain the product. It can prepare a cable core in which the inner layer carbon fiber straight yarn A and the outer layer glass fiber straight yarn B both extend axially (reference Figure 2 , that is, both the inner and outer layers are 0° straight yarns), and it can not only effectively ensure the concentricity of the inner and outer straight yarns, but also promote fiber opening during the dipping process and effectively improve the wetting effect of the resin into the yarn interior.

[0050] Example 1

[0051] like Figures 3 to 12 As shown, this embodiment provides a cable core pultrusion device, which includes at least a first curing mold 1, a second curing mold 2 and an adjustment frame 3. Among them, the first curing mold 1 is used to pre-curing the carbon fiber yarn that has been dipped in glue and extended in the axial direction to form the inner layer of the cable core. The second curing mold 2 is used to cover the glass fiber yarn that has been dipped in glue and guided in the axial direction on the outside of the inner layer of the cable core, and finally cure the yarns that are both axially extended in the inner and outer layers to form the entire cable core. The adjustment frame 3 is set at the front end of the second curing mold 2 (reference Figure 3 ), through two V-shaped pressure wheels (reference Figure 6 ) and the yarn guide groove 21 (reference Figure 7 and Figure 8 ), keep the inner carbon fiber layer and the outer glass fiber layer to be finally cured concentric and evenly arranged.

[0052] This embodiment uses a first curing die to pre-cure the inner carbon fiber layer, an adjustment frame to adjust the position of the outer glass fiber layer to maintain concentricity with the inner carbon fiber layer, and a yarn guide groove at the entrance of the second curing die to ensure more uniform arrangement of the outer yarns. Finally, the outer glass fiber layer and the inner carbon fiber layer are cured in the second curing die. This ensures that both the inner carbon fiber layer straight yarns A and the outer glass fiber layer straight yarns B extend axially, ensuring product quality. The tensile strength of the cable core produced using the pultrusion equipment of this embodiment is significantly improved.

[0053] Further Figure 6As shown, preferably but not restrictively, after the inner layer of carbon fiber is pre-cured using the first curing mold 1 of this embodiment and before the inner and outer layer fibers enter the second curing mold 2, the above-mentioned "concentric adjustment" process is performed. The two V-shaped pressure rollers include a first V-shaped pressure roller 31 and a second V-shaped pressure roller 32 arranged at the top. The two pressure rollers clamp the pre-cured inner layer of carbon fiber A therebetween. The two V-shaped pressure rollers are respectively arranged on the pressure roller mounting plates. Four groups of adjustment bolt groups 33 are respectively provided around the pressure roller mounting plates, which can be used to adjust the upper, lower, left and right positions of the two V-shaped pressure rollers. The pressure roller position can be fine-tuned by the structure of the adjustment frame 3, and then the pre-cured inner layer of carbon fiber A is aligned with the center of the second curing mold 2 to ensure the concentricity of the outer layer and the inner layer of the finished cable core. The pressure wheel mounting plate can also be used as a yarn feeding plate. The number and setting position of the yarn feeding holes on the yarn feeding plate are adapted to the yarn guide groove 21, and is used to limit the movement of the outer layer of glass fiber yarn under the action of tension, so that the outer layer of glass fiber is evenly coated on the outside of the inner layer of carbon fiber, and the inner and outer layers are kept concentric.

[0054] Further Figure 7 、 8 As shown (in order to fully present the structure of the yarn guide groove 21 and the positional relationship between the inner and outer yarns, Figure 7 (The adjustment frame 3 is not shown in the figure.) A guide groove 21 is provided at the entrance of the second curing mold 2. It is blade-shaped and extends radially. The guide grooves 21 are evenly and continuously arranged. Under the action of the tension of the outer glass fiber yarn B, the grooves can further restrict the movement of the yarn, ensuring that the outer glass fiber can evenly and completely cover the inner carbon fiber A, thereby ensuring the insulation of the cable core. Therefore, under the synergistic effect of the aforementioned adjustment frame 3 and the guide grooves 21, the finally cured inner carbon fiber and outer glass fiber can remain concentric, ensuring a more uniform coating of the outer glass fiber.

[0055] Further Figure 4 、 5 As shown, a first dipping tank 4 is provided at the front end of the first curing mold 1, and a second dipping tank 5 is provided at the front end of the second curing mold 2. An ultrasonic generator 42 is provided at the bottom of each of the first dipping tank 4 and the second dipping tank 5, which is used to provide an ultrasonic oscillation effect for the resin glue in the dipping tank. During the oscillation process, the ultrasonic generator 42 in the dipping tank can promote the opening of the yarn and increase the kinetic energy of the resin molecules, thereby accelerating the resin from penetrating into the yarn. Preferably, but not restrictively, a plurality of first guide rollers 41 are provided at intervals in the first dipping tank 4 and the second dipping tank 5. The plurality of first guide rollers 41 are arranged in a wavy shape as a whole, which is used to extend the residence time of the yarn in the dipping tank and change the direction of the yarn. The outer edge of the first guide roller 41 is serrated with concave and convex intervals, so that the yarn tension at the concave and convex positions is different, which can further improve the wetting effect of the resin 43 on the yarn. The cross-sectional EM image of the extruded product shows that the wetting effect is significantly improved.

[0056] Further Figure 9 As shown, a tension control unit 6 is provided at the front end of the second dipping tank 5. The tension control unit 6 is used to individually control the tension of each glass fiber yarn in the outer layer to ensure that the elongation of the outer layer glass fiber is compatible with the breaking elongation of the carbon fiber in the inner layer. Specifically, the tension control unit 6 includes a coaxially arranged magnetic powder brake 61 and a damping roller 62. Two second guide rollers 63 are symmetrically provided at the lower part of the damping roller 62. The direction of the glass fiber straight yarn B passing through the damping roller 62 and the second guide roller 63 is Ω-shaped (refer to Figure 9 Green line). Individually controlling the tension of each outer layer's straight glass fiber yarn (B) helps maintain uniform yarn content in the finished product. More importantly, it minimizes the impact of inconsistent elongation-at-break ratios between glass and carbon fibers on the product's tensile strength (carbon fiber has an elongation of 1.7%, while glass fiber has an elongation of 3%. Tests have shown that adjusting the tension to approximately 1.3% elongation before final curing achieves optimal results). Adjusting the tension of each glass fiber yarn maximizes the tensile strength of the finished cable core.

[0057] Further Figure 3 As shown, the carbon fiber yarn A and the glass fiber yarn B are stored and supplied by the carbon fiber creel 7 and the glass fiber creel 8 respectively, and provide corresponding tension. The first threading plate 9 is provided at the front and rear ends of the first dipping tank 4 and the convergence point of the two carbon fiber yarns. The first threading hole 91 on the first threading plate 9 is arranged as a rectangle (refer to Figure 10 The front end of the first curing mold 1 is provided with a second threading plate 10, and the second threading hole 101 of the second threading plate 10 is arranged in a circular shape as a whole (refer to Figure 11 A third threading plate 11 is provided at the front end of the adjustment frame 3 and before the two strands of glass fiber yarns B converge. The third threading holes 111 of the third threading plate 11 are arranged as two arcs.

[0058] Further Figure 3 As shown, the rear end of the second curing mold 2 is equipped with a traction crawler 12, a cutter 13, and a winder 14. The traction crawler 12 is used to pull the finally cured cable core product out of the second curing mold 2. The cutter 13 is used to cut the cable core product according to the needs of the cable core product. The winder 14 is used to wind the cut cable core product.

[0059] Example 2

[0060] like Figure 2As shown, this embodiment provides a cable core, produced using the pultrusion equipment described in Example 1. The cable core of this embodiment comprises an inner layer of carbon fibers A and an outer layer of glass fibers B. Both the carbon fiber yarns and the glass fiber yarns extend axially. Preferably, but not limiting of this, the carbon fibers have an elongation at break of 1.7%, and the glass fibers have an elongation at break of 3%. During tension control before curing the glass fibers, the elongation of the glass fibers is preferably adjusted to approximately 1.3%.

[0061] The foregoing descriptions of specific exemplary embodiments of the present invention are for purposes of illustration and description. These descriptions are not intended to limit the invention to the precise form disclosed, and it is apparent that many changes and variations are possible in light of the foregoing teachings. The exemplary embodiments are selected and described for the purpose of explaining the specific principles of the invention and their practical application, thereby enabling those skilled in the art to realize and utilize a variety of exemplary embodiments of the invention and various options and variations. Any simple modifications, equivalent variations, and modifications made to the exemplary embodiments described above are intended to fall within the scope of protection of the present invention.

Claims

1. A cable core pultrusion device, characterized in that: include: A first curing mold is used to pre-cure the carbon fiber yarns that have been impregnated and extended axially to form the inner layer of the cable core; A second curing mold is used to cover the glass fiber yarns that have been dipped in glue and guided in the axial direction on the outside of the inner layer of the cable core, and finally cure the inner and outer layers of the axially extending yarns to form the entire cable core; The adjusting frame is arranged at the front end of the second curing mold, and keeps the inner layer of carbon fiber and the outer layer of glass fiber to be finally cured concentric through two V-shaped pressure wheels arranged up and down and adjustable in position and a yarn guide groove arranged at the entrance of the second curing mold.

2. The cable core pultrusion equipment according to claim 1, characterized in that: The two V-shaped pressure wheels clamp the pre-cured inner layer of carbon fiber therebetween, and the V-shaped pressure wheels are respectively arranged on the pressure wheel mounting plates. Four groups of adjustment bolts are respectively provided around the pressure wheel mounting plates for adjusting the upper, lower, left and right positions of the two V-shaped pressure wheels.

3. The cable core pultrusion equipment according to claim 2, characterized in that: The yarn guide grooves are blade-shaped at the entrance of the second curing mold and extend radially and are evenly and continuously arranged.

4. The cable core pultrusion equipment according to claim 3, characterized in that: The pressure wheel mounting plate is also used as a yarn threading plate. The number and setting positions of the yarn threading holes on the yarn threading plate are adapted to the yarn guide groove, and are used to limit the movement of the outer layer of glass fiber yarn under the action of tension, so that the outer layer of glass fiber is evenly coated on the outside of the inner layer of carbon fiber, and the inner and outer layers are kept concentric.

5. The cable core pultrusion equipment according to claim 1, characterized in that: A first dipping tank is provided at the front end of the first curing mold, and a second dipping tank is provided at the front end of the second curing mold. Ultrasonic generators are provided at the bottom of the first dipping tank and the second dipping tank, which are used to provide ultrasonic oscillation effect for the resin glue in the dipping tank, promote yarn opening and increase the kinetic energy of resin molecules.

6. The cable core pultrusion equipment according to claim 5, characterized in that: A plurality of first yarn guide rollers are arranged at intervals in the first and second glue dipping tanks. The plurality of first yarn guide rollers are wavy in shape as a whole and are used to extend the residence time of the yarn in the glue dipping tank and change the direction of the yarn.

7. The cable core pultrusion equipment according to claim 6, characterized in that: The outer edge of the first yarn guide roller is in a sawtooth shape with concave and convex portions at intervals, so that the yarn tension at the concave and convex positions is different, thereby improving the wetting effect of the resin glue on the yarn.

8. The cable core pultrusion equipment according to claim 5, characterized in that: A tension control unit is provided at the front end of the second dipping tank for individually controlling the tension of each glass fiber straight yarn in the outer layer to ensure that the elongation of the outer layer glass fiber is compatible with the breaking elongation of the inner layer carbon fiber.

9. The cable core pultrusion equipment according to claim 8, characterized in that: The tension control unit includes a coaxially arranged magnetic powder brake and a damping roller, two second yarn guide rollers are symmetrically arranged at the lower part of the damping roller, and the direction of the glass fiber straight yarn passing through the damping roller and the second yarn guide roller is Ω-shaped.

10. The cable core pultrusion equipment according to claim 1, characterized in that: The carbon fiber yarn and the glass fiber yarn are stored and supplied by a carbon fiber creel and a glass fiber creel respectively, and corresponding tension is provided.

11. The cable core pultrusion equipment according to claim 1, characterized in that: A first yarn-threading plate is provided at the convergence point of the two strands of carbon fiber yarns and at the front and rear ends of the first dipping tank. The yarn-threading holes on the first yarn-threading plate are arranged in a rectangular shape as a whole.

12. The cable core pultrusion equipment according to claim 1, characterized in that: A second yarn-threading plate is provided at the front end of the first curing mold, and the yarn-threading holes of the second yarn-threading plate are arranged in a circular shape as a whole.

13. The cable core pultrusion equipment according to claim 1, characterized in that: A third yarn-threading plate is provided at the front end of the adjusting frame and at a position before the two strands of glass fiber yarn converge. The yarn-threading holes of the third yarn-threading plate are arranged as a whole in two arcs.

14. The cable core pultrusion equipment according to claim 1, characterized in that: The rear end of the second curing mold is provided with: A traction crawler, which is used to pull the finally cured cable core product out of the second curing mold; Cutting machine, which is used to cut the cable core products according to their needs; A winding machine is used to wind up the cut cable core product.

15. A cable core, characterized in that: The preparation is carried out using the pultrusion equipment according to any one of claims 1 to 14.

16. The cable core according to claim 15, characterized in that The cable core comprises an inner carbon fiber layer and an outer glass fiber layer, and the carbon fiber yarns and the glass fiber yarns both extend in the axial direction.

17. The cable core according to claim 16, characterized in that The breaking elongation of the carbon fiber is 1.7%, and the breaking elongation of the glass fiber is 3%. During the tension control process before the glass fiber is solidified, the elongation of the glass fiber is adjusted to 1.3%.

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