Composite core mold

Abstract

The utility model discloses a composite core mold which comprises a lining layer, a metal reinforcing layer and an outer covering layer which are sequentially connected from inside to outside, the axial length of the metal reinforcing layer is smaller than the axial length of the lining layer and the axial length of the outer covering layer, sealing layers are arranged on the two axial end faces of the metal reinforcing layer respectively, and the inner surfaces of the sealing layers are connected with the outer surface of the lining layer. The outer surface of the sealing layer is connected with the inner surface of the outer covering layer, and the metal reinforcing layer continuously stretches across the heavy load bearing area. The metal reinforcing layer with low cost and high bending modulus is additionally arranged between the two fiber layers, so that compared with a traditional pure fiber core mold, the core mold has the advantages that the bending modulus is higher, the cost is low, the bearing limit is larger, the weight is lighter under the condition of the same bearing performance, and the core mold is easier to transport; meanwhile, the sealing layer is arranged to prevent dissimilar metal pollution, and the winding quality of foil products is guaranteed; by ensuring the roundness of the metal reinforcing layer, the processing efficiency of the outer covering layer is improved, and the process difficulty is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of composite core mould, belong to fiber composite material winding forming technical field. BACKGROUND

[0002] Composite material winding core mould plays a very important role in the storage and transportation of foil materials, especially in the packaging and transportation of thin materials such as copper foil, aluminum foil and carbon foil. It provides effective support and protection for solving the deformation and damage problems of winding materials during transportation. As a kind of tool clamp, the winding material can be fixed and protected from external force, so as to ensure the quality and shape of the foil product during storage and transportation. However, with the development of science and technology and the improvement of production process, the requirements for core mould are becoming higher and higher. Especially the contradiction between the weight of the material and the carrying capacity of the winding core mould has become a difficult problem in the design and application of the core mould.

[0003] The traditional core mould is widely used in the preparation of foil product packaging and transportation core mould because of its low cost and high tensile bending strength. The carrying capacity of glass fiber winding pipe is closely related to its winding thickness. If the weight of the foil product increases, in order to ensure that the core mould can bear heavier winding materials, the thickness of the glass fiber winding must be increased, otherwise the glass fiber winding pipe cannot bear the overloading foil product, which is easy to deform and difficult to bear heavier winding, resulting in the scrap of foil product. Although this method improves the strength of the core mould to some extent, the increase of winding thickness will directly lead to the increase of the overall volume of the core mould, which reduces the convenience of core mould transportation and increases the production cost. Secondly, the increase of winding thickness will also affect the production efficiency. With the increase of the number of glass fiber layers, the complexity of the production process will also increase, which will affect the overall production efficiency.

[0004] In addition to using glass fiber winding, carbon fiber with higher strength is also used for winding, but the cost of carbon fiber material is higher, and the thickness after winding still increases with the carrying weight, which cannot meet the larger carrying weight while reducing the increase of material winding thickness, and the problems of limited carrying capacity, inconvenient transportation and rising cost still exist. In addition, due to the length of the core mould is usually 1.6-1.7m, it is difficult to ensure the straightness of the core mould under the condition of carrying, which will directly affect the bending resistance of the core mould. SUMMARY

[0005] The utility model provides a kind of composite core mould for the deficiencies in the prior art, by adding metal reinforcing layer in traditional pure fiber core mould, improve the bending resistance of core mould, reduce production cost.

[0006] Technical scheme: A composite core mold comprises an inner lining layer, a metal reinforcing layer and an outer covering layer connected in sequence from inside to outside, the axial length of the metal reinforcing layer is smaller than the axial length of the inner lining layer and the outer covering layer, the axial ends of the metal reinforcing layer are respectively provided with a sealing layer, the inner surface of the sealing layer is connected with the outer surface of the inner lining layer, the outer surface of the sealing layer is connected with the inner surface of the outer covering layer, and the metal reinforcing layer continuously spans the load-bearing heavy load area.

[0007] The utility model discloses a combination of fiber and metal, improve the strength of the core mold, reduce the dosage of fiber material, and further reduce the cost, the cost of pure fiber material, improve the bending modulus and the bearing limit, reduce the weight of the core mold, convenient transportation, the metal reinforcing layer is completely wrapped in the fiber, and the metal reinforcing layer is not allowed to leak out, avoid the contact of the metal reinforcing layer and the foil product roll to cause the pollution of the different metal, or the friction of the metal reinforcing layer and the tooling to cause the metal powder to drop and contact the foil product roll to cause the pollution of the different metal.

[0008] Preferably, in order to improve the bending strength of the core mold, the inner lining layer and the outer covering layer respectively comprise an axial winding layer and a radial winding layer, the axial winding layer and the radial winding layer are alternately arranged, the winding angle of the axial winding layer is 10-50° with respect to the axis of the mandrel, and the winding angle of the radial winding layer is 60-90° with respect to the axis of the mandrel.

[0009] The axial winding mode can further improve the bending strength of the core mold, and in order to improve the reliability and stability of the axial winding, the axial winding layer is alternately arranged with the radial winding layer to stabilize each layer of the axial winding layer, so that the bending strength of the core mold is improved, and the reliability and stability during winding are ensured.

[0010] Preferably, in order to match the bending strength of the core mold with the bearing demand, and ensure the reliability and stability of the core mold, the proportion of the axial winding layer is 40-85%, and the remaining 15-60% is the proportion of the radial winding layer.

[0011] Preferably, in order to improve the bending performance of the core mold, the cross section of the outer covering layer is circular. The straightness and roundness of the core mold as a whole are ensured to improve the strength and bending performance of the core mold, and the circular shape is convenient for processing and aluminum foil winding.

[0012] Preferably, in order to reduce the weight of the core mold, the metal reinforcing layer is a hollow metal framework.

[0013] Preferably, in order to improve the bending performance of the core mold, the metal reinforcing layer is a solid metal framework.

[0014] Preferably, in order to further reduce the weight of the core mold, the metal framework is arranged along the outer diameter circumferential direction of the inner lining layer.

[0015] Preferably, in order to improve the processing efficiency when processing the outer cover layer, a filler is arranged between adjacent metal skeletons, and the cross-sectional outer diameter formed by the filler and the metal skeleton is circular.

[0016] The profile of the metal reinforcing layer is rounded by the filler, so that the outer cover layer can be directly wound on the basis of the metal reinforcing layer with a circular cross-sectional outer diameter, which helps to improve the processing efficiency of the outer cover layer on the basis of ensuring the roundness, and facilitates the processing of the outer cover layer.

[0017] Preferably, in order to facilitate the installation of the metal skeleton, at least two groups of metal skeletons connected end to end in the circumferential direction are arranged, and the axial length of each group of metal skeletons is equal. Since the length of the core mold is usually 1.6-1.7m, it is difficult to install the complete metal skeleton, so the metal skeleton is divided, and then the divided metal skeletons are connected end to end and installed in sequence, which improves the processing efficiency and reduces the process difficulty. For example, the cylindrical metal skeleton is cut in the axial direction, and the cut metal skeletons are connected end to end and installed in sequence.

[0018] Preferably, in order to enable the outer cover layer to be wound on the basis of the roundness of the metal reinforcing layer and improve the processing efficiency of the outer cover layer, the thickness of the metal reinforcing layer is the same as the thickness of the closed layer.

[0019] Preferably, in order to improve the bending modulus, the materials of the outer cover layer and the inner liner layer are both reinforced fiber materials.

[0020] Beneficial effects: the metal reinforcing layer with low cost and high bending modulus is arranged between the two fiber layers, compared with the traditional pure fiber core mold under the same bearing requirement, the core mold of the utility model not only has higher bending modulus, lower cost, and greater bearing limit, but also has lighter weight under the same bearing performance, and is more easily transported; the closed layer is arranged to prevent foreign metal pollution and ensure the quality of the foil product roll; the roundness of the metal reinforcing layer is ensured to improve the processing efficiency of the outer cover layer and reduce the process difficulty. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only the embodiments of the utility model, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of the provided drawings.

[0022] Figure 1 It is a structural schematic diagram of the utility model;

[0023] Figure 2The utility model discloses a schematic diagram of a load-bearing heavy load area;

[0024] Figure 3 The utility model discloses a schematic diagram of the cross section of structure;

[0025] Figure 4 The utility model discloses a schematic diagram of the metal framework of the hollow structure of the metal reinforcing layer;

[0026] Figure 5 The utility model discloses a schematic diagram of the H-shaped steel beam of the metal framework;

[0027] Figure 6 The utility model discloses a schematic diagram of the I-shaped steel of the metal framework;

[0028] Figure 7 The utility model discloses a schematic diagram of the metal framework of the head-to-tail connection;

[0029] Figure 8 The utility model discloses a schematic diagram of the metal framework of the head-to-tail connection with the hollow structure. DETAILED DESCRIPTION

[0030] The technical scheme in the embodiments of the utility model will be apparently and completely described below with the drawings in the embodiments of the utility model, and apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without creative work belong to the range of protection of the utility model.

[0031] In the description of the utility model, it is understood that the orientation or position relation indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relation based on the drawings shown, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore can not be understood as a limitation to the utility model.

[0032] In the utility model, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include that the first and second features are directly contacted, or can include that the first and second features are not directly contacted but are contacted through another feature between them. Moreover, the "upper", "upper side" and "upper surface" of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than the second feature. The "lower", "lower side" and "lower surface" of the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than the second feature.

[0033] As shown in Figure 1 A composite core mold, comprising an inner liner layer 1, a metal reinforcing layer 2 and an outer cover layer 3 connected in sequence from inside to outside, the axial length of the metal reinforcing layer 2 is less than that of the inner liner layer 1 and the outer cover layer 3, the axial ends of the metal reinforcing layer 2 are respectively provided with a sealing layer 4, the inner surface of the sealing layer 4 is connected with the outer surface of the inner liner layer 1, and the outer surface of the sealing layer 4 is connected with the inner surface of the outer cover layer 3, and the metal reinforcing layer 2 continuously spans the heavy load bearing area. Figure 2 As shown in the figure, it is a schematic diagram of the heavy load bearing area.

[0034] By combining fiber and metal, the strength of the core mold is improved while the amount of fiber material is reduced, thereby reducing the cost. The cost of using fiber material alone is improved, the bending modulus and the load limit are improved, the weight of the core mold is reduced, the transportation is facilitated, the metal reinforcing layer 2 is completely wrapped in the fiber, the metal reinforcing layer 2 is not exposed, and the contact between the metal reinforcing layer 2 and the foil product during winding causes foreign metal pollution, or the friction between the metal reinforcing layer 2 and the tooling causes metal powder to fall and contact the foil product during winding, causing foreign metal pollution.

[0035] In order to improve the bending strength of the core mold, the inner liner layer 1 and the outer cover layer 3 respectively comprise an axial winding layer and a radial winding layer, the axial winding layer and the radial winding layer are arranged alternately, the winding angle of the axial winding layer is 10-50° with respect to the axis of the mandrel, and the winding angle of the radial winding layer is 60-90° with respect to the axis of the mandrel.

[0036] The axial winding mode can further improve the bending strength of the core mold, and in order to improve the reliability and stability of the axial winding, the axial winding layer is alternately arranged with the radial winding layer to stabilize each layer of the axial winding layer, so as to improve the bending strength of the core mold while ensuring its reliability and stability during winding.

[0037] In order to match the bending strength of the core mold with the load demand while ensuring the reliability and stability of the core mold, the proportion of the axial winding layer is 40-85%, and the remaining 15-60% is the radial winding layer.

[0038] As shown in Figure 3 In order to improve the bending performance of the core mold, the cross section of the outer cover layer 3 is circular. The straightness and circularity of the whole core mold are ensured to improve the strength and bending performance of the core mold, and the circular shape is convenient for processing and winding of aluminum foil. The metal reinforcing layer 2 is a solid metal skeleton 21.

[0039] As shown in Figure 4 In order to reduce the weight of the core mold, the metal reinforcing layer 2 is a hollow metal skeleton 21.

[0040] As Figure 5 and Figure 6 In order to further reduce the weight of the core mold, the metal skeleton 21 is arranged along the outer diameter circumferential direction of the inner liner 1. The metal skeleton 21 used in this embodiment is a steel beam and an I-beam.

[0041] In order to improve the processing efficiency when processing the outer cover layer 3, a filler 22 is arranged between adjacent metal skeletons 21, and the cross-sectional outer diameter of the metal skeleton 21 and the filler 22 is circular.

[0042] The profile of the metal reinforcement layer 2 is rounded by the filler 22, so that the outer cover layer 3 can be directly wound on the basis of the metal reinforcement layer 2 with a circular cross-sectional outer diameter, which helps to improve the processing efficiency of the outer cover layer 3 while ensuring the roundness, and facilitates the processing of the outer cover layer 3.

[0043] As Figure 7 and Figure 8 In order to facilitate the installation of the metal skeleton 21, at least two groups of metal skeletons 21 are arranged along the circumferential direction and connected end to end, and the axial length of each group of metal skeletons 21 is equal.

[0044] Since the length of the core mold is usually 1.6-1.7m, it is difficult to install the complete metal skeleton 21, so the metal skeleton 21 is divided, and then the divided metal skeletons 21 are connected end to end and installed in sequence, which improves the processing efficiency and reduces the process difficulty. For example, the cylindrical metal skeleton 21 is cut along the axial direction, and the cut metal skeletons 21 are connected end to end and installed in sequence.

[0045] In order to enable the outer cover layer 3 to be wound on the basis of the roundness of the metal reinforcement layer 2 and improve the processing efficiency of the outer cover layer 3, the thickness of the metal reinforcement layer 2 is the same as the thickness of the sealing layer 4.

[0046] In order to improve the bending modulus, the materials of the outer cover layer 3 and the inner liner 1 are both reinforced fiber materials.

[0047] The process method for preparing the composite core mold comprises the following steps:

[0048] Step 1, material preparation: according to the current winding load bearing requirement, the thicknesses of the inner liner 1, the metal reinforcement layer 2 and the outer cover layer 3 and the load bearing area position of the core mold are simulated, and the reinforced fiber, resin, curing agent, metal skeleton 21 and filler 22 are prepared, and the resin and curing agent are mixed for subsequent winding;

[0049] The thickness of each layer in the embodiment includes but is not limited to 1-10 mm, the reinforcing fiber material of the utility model includes but is not limited to glass fiber, basalt fiber, carbon fiber and other reinforcing fibers, and the carbon fiber of T700 level or above is used as the reinforcing fiber in the embodiment.The material of the metal framework 21 in the utility model includes but is not limited to carbon steel, stainless steel, alloy steel, aluminum alloy and other pipe or profile materials, and the structure of the metal framework 21 includes but is not limited to straight pipe, wave pipe, profile and other reinforcing structures.The filler 22 in the embodiment adopts hard polyurethane foam.The resin in the embodiment adopts bisphenol A type epoxy resin with a viscosity of 400-800 mPa·s, and the curing agent selects an acid anhydride curing agent.

[0050] Step two, inner liner layer 1 preparation: according to the thickness of the inner liner layer 1 simulated in step one, the reinforcing fiber with resin attached is wound on the outer surface of the mandrel by a winding machine;

[0051] Step three, metal reinforcing layer 2 installation: according to the thickness of the metal reinforcing layer 2 simulated in step one and the position of the heavy load bearing area of the core mold, the metal reinforcing layer 2 is fixed on the outer surface of the inner liner layer 1 along the circumferential direction of the outer diameter of the inner liner layer 1, and the roundness of the metal reinforcing layer 2 is checked to be within 0.1 mm, and if not, the filler 22 is used for filling;

[0052] When the metal reinforcing layer 2 is the metal framework 21 arranged at intervals along the circumferential direction of the outer diameter of the inner liner layer 1, the step three is:

[0053] The metal framework 21 is fixed on the inner liner layer 1 along the circumferential direction of the outer diameter of the inner liner layer 1 through the resin on the outer surface of the inner liner layer 1, a mold with a circular cross section is sleeved on the outer surface of the metal framework 21, the filler 22 is filled into the gap between the adjacent metal framework 21 and the gap between the outer surface of the metal framework 21 and the inner surface of the mold, and when the roundness of the metal reinforcing layer 2 is within 0.1 mm, the mold is removed, and the installation of the metal reinforcing layer 2 is completed;

[0054] The step three is:

[0055] The metal framework 21 is placed into a mold with a circular cross section, the gap between the metal framework 21 and the mold is filled with the filler 22, and after the roundness of the metal reinforcing layer 2 is within 0.1 mm, the metal reinforcing layer 2 is prepared into a shape, demolded to form a prefabricated metal reinforcing layer 2, cut into at least two groups along the axial direction, fixed on the inner liner layer 1 along the circumferential direction, and the installation of the metal reinforcing layer 2 is completed.

[0056] When the metal reinforcing layer 2 is the metal framework 21 connected end to end along the circumferential direction of the outer diameter of the inner liner layer 1, the step three is specifically:

[0057] The metal skeleton 21 is cut into at least two groups along the axial direction, and the cut metal skeleton 21 is fixed on the inner liner 1 in sequence along the circumferential direction, and the installation of the metal reinforcing layer 2 is completed.

[0058] Step four, the installation of the closing layer 4: the closing layer 4 with the same thickness as the metal reinforcing layer 2 is fixed at both ends of the metal reinforcing layer 2, and the closing layer 4 is prepared by sticking the reinforcing fiber cloth or by winding the reinforcing fiber on the end surfaces of the metal reinforcing layer 2 by using a winding machine;

[0059] In the embodiment, the 3K plain weave 200g / m2 carbon fiber braid is used as the reinforcing fiber cloth.

[0060] Step five, the installation of the outer covering layer 3: according to the thickness of the outer covering layer 3 obtained by simulation in step one, the reinforcing fiber with resin attached is wound on the metal reinforcing layer 2 and the closing layer 4 at both ends by using a winding machine;

[0061] Step six, the curing of the core mold: the preheating and gelling are performed at 70-80℃, and then the core mold is prepared by heating to 130-140℃;

[0062] Step seven, demolding, and the core rod is extracted.

[0063] In the description, the embodiments are described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the related parts can be referred to the method part.

[0064] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A composite core mold characterized by: It comprises an inner lining layer (1), a metal reinforcing layer (2) and an outer covering layer (3) connected in sequence from inside to outside, the axial length of the metal reinforcing layer (2) is less than the axial length of the inner lining layer (1) and the outer covering layer (3), the axial both ends of the metal reinforcing layer (2) are respectively provided with a sealing layer (4), the inner surface of the sealing layer (4) is connected with the outer surface of the inner lining layer (1), the outer surface of the sealing layer (4) is connected with the inner surface of the outer covering layer (3), and the metal reinforcing layer (2) continuously spans the load-bearing heavy load area.

2. The composite core die of claim 1, wherein: The inner lining layer (1) and the outer covering layer (3) respectively comprise an axial winding layer and a radial winding layer, the axial winding layer and the radial winding layer are arranged alternately, the winding angle of the axial winding layer is 10-50° with respect to the axis of the mandrel, and the winding angle of the radial winding layer is 60-90° with respect to the axis of the mandrel.

3. The composite core die of claim 2, wherein: The proportion of the axial winding layer is 40-85%, and the remaining 15-60% is the proportion of the radial winding layer.

4. The composite mandrel of claim 1, wherein: The cross section of the outer covering layer (3) is circular.

5. The composite core die of claim 4, wherein: The metal reinforcing layer (2) is a metal framework (21) of hollow structure (5).

6. The composite core die of claim 4, wherein: The metal reinforcing layer (2) is a solid metal framework (21).

7. The composite core die of claim 5, wherein: The metal framework (21) is arranged in the circumferential direction of the outer diameter of the inner lining layer (1) at intervals.

8. The composite core die of claim 7, wherein: The filling material (22) is arranged between adjacent metal frameworks (21), and the cross section of the metal framework (21) and the filling material (22) is circular.

9. The composite core of claim 5 or 6, wherein: At least two groups of metal frameworks (21) are arranged in the circumferential direction and connected end to end, and the axial length of each group of metal frameworks (21) is equal.

10. The composite core die of claim 4, wherein: The thickness of the metal reinforcing layer (2) is the same as the thickness of the sealing layer (4).

11. The composite mandrel of claim 1, wherein: The materials of the outer covering layer (3) and the inner lining layer (1) are both reinforced fiber materials.

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