Barrel sand core mold winding tool

Abstract

The utility model discloses a barrel sand core mold winding tool, which belongs to the technical field of composite material shell manufacturing, and comprises a mandrel tool and a molding sand core, the core shaft tool comprises a front flange core shaft and a rear flange core shaft, a screw hole is formed in one end face of the front flange core shaft, a through hole matched with the screw hole is formed in one end face of the rear flange core shaft, and the front flange core shaft and the rear flange core shaft are spliced and fixed in the mode that a fastening bolt penetrates through the through hole and is screwed into the screw hole. A first positioning assembly is installed on the front flange mandrel and used for fastening and fixing a front flange, the front flange mandrel and the rear flange mandrel are wrapped with the forming sand core, and the forming sand core is used for supporting a composite shell. Compared with the prior art, the barrel sand core mold winding tool is light in weight, simple in structure and low in tool cost, the sand core mold can be dissolved only by washing the sand core mold with water during demolding, and demolding is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of composite material shell manufacturing, and specifically relates to a cylindrical sand core mold winding tooling. Background Art

[0002] Carbon fiber composite shells have the characteristics of light weight, high strength, simple structure, etc. They have better insulation properties and can better withstand high and low temperature performance than traditional metal shells. Therefore, carbon fiber composite shells are widely used.

[0003] In the prior art, a carbon fiber composite material shell is usually formed by winding a shell using a winding tool. The traditional metal winding core mold has the disadvantages of being heavy, complex in structure, difficult to disassemble and assemble, and inconvenient to demould.

[0004] Therefore, in order to solve the above problems, a cylindrical sand core mold winding tool is proposed.

[0005] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content

[0006] The utility model aims to provide a cylindrical sand core mold winding tooling, which is light in weight, simple in structure and low in tooling cost. When demoulding, the sand core mold can be dissolved by just washing it with water, which is convenient for demoulding.

[0007] In order to achieve the above purpose, the technical solution provided by a specific embodiment of the utility model is as follows:

[0008] A cylindrical sand core mold winding tooling, the cylindrical body is a carbon fiber composite material cylindrical body, the carbon fiber composite material cylindrical body comprises a front flange, a composite material shell and a rear flange, the front flange and the rear flange are respectively located at two ends of the composite material shell, the sand core mold winding tooling comprises: a mandrel tooling and a forming sand core;

[0009] The mandrel tooling comprises a front flange mandrel and a rear flange mandrel, wherein a screw hole is provided on one end surface of the front flange mandrel, and a through hole matching the screw hole is provided on one end surface of the rear flange mandrel, and the front flange mandrel and the rear flange mandrel are spliced ​​and fixed by fastening bolts passing through the through holes and screwed into the screw holes;

[0010] A first positioning assembly is installed on the front flange mandrel, and the first positioning assembly is used to fasten and fix the front flange. A second positioning assembly is installed on the rear flange mandrel, and the second positioning assembly is used to fasten and fix the rear flange.

[0011] The molding sand core is wrapped around the outside of the front flange mandrel and the rear flange mandrel, and the molding sand core is used for supporting the composite material shell.

[0012] In one or more embodiments of the present invention, the diameter of the front flange core shaft is smaller than the diameter of the rear flange core shaft.

[0013] In one or more embodiments of the present invention, the portion of the rear flange core shaft located inside the molding sand core is the optical axis.

[0014] In one or more embodiments of the present invention, the front flange core shaft and the rear flange core shaft are coaxially connected.

[0015] In one or more embodiments of the present invention, the front flange mandrel and the rear flange mandrel are located on the central axis of the molding sand core.

[0016] In one or more embodiments of the present invention, the first positioning assembly includes a front flange locking nut and a front flange positioning tool, the front flange core shaft and the rear flange core shaft both have a stepped boss, the boss on the front flange core shaft has a thread matching the front flange locking nut, the front flange and the front flange positioning tool can be inserted into the front flange core shaft and fixed by the front flange locking nut.

[0017] In one or more embodiments of the present invention, the second positioning assembly includes a rear flange positioning tool and a rear flange locking nut, the boss on the rear flange core shaft has a thread matching the rear flange locking nut, and the rear flange and the rear flange positioning tool can be inserted into the rear flange core shaft and fixed by the rear flange locking nut.

[0018] Compared with the prior art, the cylindrical sand core mold winding tooling of the utility model is light in weight, simple in structure, and low in tooling cost. When demolding, the sand core mold can be dissolved by simply washing it with water, which is convenient for demolding.

[0019] By tightening the front flange mandrel and the rear flange mandrel connected by bolts, the rear flange mandrel can be forcibly pulled out first when removing the mold, so that a large area of ​​the molded sand core can be exposed, the sand flushing efficiency is greatly improved, and the sand core flushing time is greatly shortened, so that the mold can be quickly demolded. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1It is a structural schematic diagram of a cylindrical sand core mold winding tool after winding is completed in one embodiment of the utility model;

[0022] Figure 2 This is a schematic diagram of a carbon fiber composite material cylinder structure of a cylinder sand core mold winding tooling in one embodiment of the utility model;

[0023] Figure 3 It is a structural schematic diagram of a cylindrical sand core mold winding tooling in one embodiment of the utility model;

[0024] Figure 4 It is a cross-sectional view of the connection between the front flange mandrel and the rear flange mandrel of a cylindrical sand core mold winding tooling in one embodiment of the utility model;

[0025] Figure 5 It is a side view of a rear flange mandrel of a cylindrical sand core mold winding tooling in one embodiment of the utility model;

[0026] Figure 6 It is a structural schematic diagram of a cylindrical sand core mold winding tooling after the rear flange mandrel is pulled out in one embodiment of the utility model;

[0027] Figure 7 It is a schematic structural diagram of a formed sand core of a cylindrical sand core mold winding tooling after washing and dissolving in one embodiment of the utility model.

[0028] Description of main reference numerals:

[0029] 1. Carbon fiber composite material cylinder; 11. Front flange; 12. Composite material shell; 13. Rear flange; 2. Mandrel tooling; 21. Front flange mandrel; 22. Front flange locking nut; 23. Front flange positioning tooling; 24. Rear flange positioning tooling; 25. Rear flange locking nut; 26. Rear flange mandrel; 3. Molding sand core; 4. Sand core molding mold; 41. Cylinder; 42. Mandrel positioning plate; 5. Prefabricated sand core. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0031] like Figures 1 to 5As shown, a cylindrical sand core mold winding tool in one embodiment of the utility model, the cylindrical body is a carbon fiber composite cylindrical body 1, and the carbon fiber composite cylindrical body 1 includes a front flange 11, a composite shell 12 and a rear flange 13, and the front flange 11 and the rear flange 13 are respectively located at two ends of the composite shell 12. Among them, the inner diameter of the front flange 11 is smaller than the inner diameter of the rear flange 13.

[0032] The sand core mold winding tooling comprises a mandrel tooling 2 and a molding sand core 3. The molding sand core 3 is bonded to the outside of the mandrel tooling 2 and is used for winding the carbon fiber bundle.

[0033] like Figure 4 and Figure 5 As shown, the mandrel tooling 2 includes a front flange mandrel 21 and a rear flange mandrel 26. A plurality of groups of screw holes distributed in an annular manner are evenly opened on one end surface of the front flange mandrel 21, and a through hole matching the screw holes is evenly opened on one end surface of the rear flange mandrel 26. The front flange mandrel 21 and the rear flange mandrel 26 are spliced ​​and fixed by fastening bolts passing through the through holes and screwed into the screw holes.

[0034] Specifically, the end face of the front flange core shaft 21 with the screw hole is connected with the end face of the rear flange core shaft 26 with the through hole, and the front flange core shaft 21 and the rear flange core shaft 26 can be fixed by fastening bolts to achieve splicing and fixation of the front flange core shaft 21 and the rear flange core shaft 26.

[0035] like Figure 1 and Figure 3 As shown, the molding sand core 3 is wrapped around the outside of the front flange mandrel 21 and the rear flange mandrel 26, and the front flange mandrel 21 and the rear flange mandrel 26 are located on the central axis of the molding sand core 3. The molding sand core 3 is used to support the composite material shell 12 and assist in winding to prepare the carbon fiber composite material cylinder 1.

[0036] The front flange mandrel 21 is provided with a first positioning assembly, which is used to fasten and fix the front flange 11. The first positioning assembly includes a front flange locking nut 22 and a front flange positioning tool 23. Both the front flange mandrel 21 and the rear flange mandrel 26 have stepped bosses. The bosses on the front flange mandrel 21 have threads that match the front flange locking nut 22. The front flange 11 and the front flange positioning tool 23 can be inserted into the front flange mandrel 21 in sequence and fixed by the front flange locking nut 22, thereby realizing the positioning and assembly of the front flange 11.

[0037] A second positioning assembly is installed on the rear flange mandrel 26, and the second positioning assembly is used to fasten and fix the rear flange 13. The second positioning assembly includes a rear flange positioning tool 24 and a rear flange locking nut 25. The boss on the rear flange mandrel 26 has a thread matching the rear flange locking nut 25. The rear flange 13 and the rear flange positioning tool 24 can be inserted into the rear flange mandrel 26 in sequence and fixed by the rear flange locking nut 25 to achieve the positioning assembly of the rear flange 13.

[0038] Specifically, when the mandrel tool 2 and the molding sand core 3 are used to prepare the carbon fiber composite material cylinder 1, the front flange 11 is first assembled on the front flange mandrel 21 using the front flange locking nut 22 and the front flange positioning tool 23, and then the rear flange 13 is assembled on the rear flange mandrel 26 using the rear flange positioning tool 24 and the rear flange locking nut 25, and finally the carbon fiber bundle is wound around the outside of the molding sand core 3 and cured, so that a complete carbon fiber composite material cylinder 1 consisting of the front flange 11, the composite material shell 12 and the rear flange 13 can be obtained. The sand core mold winding tool consisting of the mandrel tool 2 and the molding sand core 3 has a simple structure, light weight and low cost.

[0039] The part of the rear flange mandrel 26 located inside the molding sand core 3 is a light axis, and after the fastening bolts are removed, the rear flange mandrel 26 can be directly pulled out from the molding sand core 3. After the rear flange mandrel 26 is pulled out, the molding sand core 3 is exposed, and the molding sand core 3 can be washed with water at this time to dissolve the molding sand core 3.

[0040] The front flange mandrel 21 and the rear flange mandrel 26 are coaxially connected, and the diameter of the front flange mandrel 21 is smaller than the diameter of the rear flange mandrel 26. After the rear flange mandrel 26 is pulled out, the front flange mandrel 21 can also be pulled out smoothly. After the molding sand core 3 is completely dissolved, the front flange mandrel 21 can be easily pulled out.

[0041] Specifically, after the carbon fiber composite material cylinder 1 is prepared and formed using the tool, the fastening bolts used to fix the front flange mandrel 21 and the rear flange mandrel 26 are removed, the rear flange mandrel 26 can be pulled out, and then the molded sand core 3 is rinsed and dissolved with water. After the rinsing is completed, the front flange mandrel 21 is pulled out from one side of the rear flange 13, and the sand core mold winding tool can be completely separated from the carbon fiber composite material cylinder 1, completing the entire demoulding process.

[0042] In this way, by forcibly pulling out the rear flange mandrel 26, a large area of ​​the molding sand core 3 is exposed, and then the sand core is flushed. The larger the exposed area of ​​the molding sand core 3, the higher the sand flushing efficiency and the shorter the time. In this way, the flushing time of the molding sand core 3 is greatly shortened, and the use efficiency of the tooling is improved.

[0043] When in use, the front flange 11 and the front flange positioning tool 23 are assembled together and inserted into the front flange mandrel 21, and the front flange locking nut 22 is used to lock and fix, and then the rear flange 13 and the rear flange positioning tool 24 are assembled together and inserted into the rear flange mandrel 26, and the rear flange locking nut 25 is used to lock and fix, and the positioning and installation of the front flange 11 and the rear flange 13 are completed. Then, the complete carbon fiber composite material cylinder 1 can be prepared by winding using the cylinder sand core mold winding tool.

[0044] like Figure 6 and Figure 7 As shown, when the carbon fiber composite material cylinder 1 is demolded after molding, the front flange locking nut 22 and the rear flange locking nut 25 are first removed, and then the front flange positioning tooling 23 and the rear flange positioning tooling 24 are removed, and then the fastening bolts between the front flange core shaft 21 and the rear flange core shaft 26 are removed, and then the rear flange core shaft 26 is pulled out, and then the molding sand core 3 is exposed, and the molding sand core 3 is rinsed with water. After the rinsing is completed, the front flange core shaft 21 is pulled out from the rear flange 13 to complete the demolding.

[0045] Compared with the prior art, the cylindrical sand core mold winding tooling of the utility model is light in weight, simple in structure, and low in tooling cost. When demolding, the sand core mold can be dissolved by simply washing it with water, which is convenient for demolding.

[0046] By tightening the front flange core shaft 21 and the rear flange core shaft 26 connected by bolts, the rear flange core shaft 26 can be forcibly pulled out first when removing the mold, so that a large area of ​​the molded sand core 3 can be exposed, the sand flushing efficiency is greatly improved, and the sand core flushing time is greatly shortened, so that the mold can be quickly demolded.

[0047] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0048] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A cylindrical sand core mold winding tooling, wherein the cylindrical body is a carbon fiber composite material cylindrical body, the carbon fiber composite material cylindrical body comprises a front flange, a composite material shell and a rear flange, the front flange and the rear flange are respectively located at two ends of the composite material shell, characterized in that: The sand core mold winding tooling comprises: The mandrel tooling comprises a front flange mandrel and a rear flange mandrel, wherein a screw hole is provided on one end surface of the front flange mandrel, and a through hole matching the screw hole is provided on one end surface of the rear flange mandrel, and the front flange mandrel and the rear flange mandrel are spliced ​​and fixed by fastening bolts passing through the through holes and screwing into the screw holes; A first positioning assembly is installed on the front flange mandrel, and the first positioning assembly is used to fasten and fix the front flange. A second positioning assembly is installed on the rear flange mandrel, and the second positioning assembly is used to fasten and fix the rear flange. The molding sand core is wrapped around the outside of the front flange core shaft and the rear flange core shaft, and the molding sand core is used to support the composite material shell.

2. The cylindrical sand core mold winding tooling according to claim 1 is characterized in that: The diameter of the front flange core shaft is smaller than the diameter of the rear flange core shaft.

3. The cylindrical sand core mold winding tooling according to claim 2 is characterized in that: The part of the rear flange mandrel located inside the molding sand core is the optical axis.

4. The cylindrical sand core mold winding tooling according to claim 3 is characterized in that: The front flange core shaft and the rear flange core shaft are coaxially connected.

5. The cylindrical sand core mold winding tooling according to claim 4 is characterized in that: The front flange core shaft and the rear flange core shaft are located on the central axis of the molding sand core.

6. The cylindrical sand core mold winding tooling according to claim 1 is characterized in that: The first positioning assembly includes a front flange locking nut and a front flange positioning tool. The front flange core shaft and the rear flange core shaft both have stepped bosses. The bosses on the front flange core shaft have threads that match the front flange locking nut. The front flange and the front flange positioning tool can be inserted into the front flange core shaft and fixed by the front flange locking nut.

7. The cylindrical sand core mold winding tooling according to claim 6 is characterized in that: The second positioning assembly includes a rear flange positioning tool and a rear flange locking nut. The boss on the rear flange spindle has a thread matching the rear flange locking nut. The rear flange and the rear flange positioning tool can be inserted into the rear flange spindle and fixed by the rear flange locking nut.

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