Molding tool for sand core of high-pressure composite material barrel
By designing a high-pressure composite cylinder sand core forming tooling including support platform, mandrel, molded housing assembly and cover plate, the problem of not tightening of sand and difficulty in preparing sand cores in different shapes is solved, and a higher strength and lower cost sand core forming is achieved.
Patent Information
- Application Number
- CN202421458062.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-25
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2034-06-25
AI Technical Summary
The existing sand core forming tooling is prone to cause the sand to be not tight during molding, resulting in low sand core forming strength and difficult to prepare sand cores of different shapes.
A high-pressure composite cylinder sand core molding tooling is designed, including a support platform, mandrel, molded housing assembly and cover plate. Through a limited block and a removable molded housing assembly, the sand is compact and the preparation of sand cores of different shapes is ensured.
The firmer forming of the sand core is achieved, the strength of the sand core is improved, and the preparation of sand cores of different shapes is facilitated, the production cost of cylinder sand cores is reduced, and the use and maintenance of tooling is simplified.
Smart Images
Figure CN222767255U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of sand core forming tooling, and in particular relates to a high-pressure composite material cylinder sand core forming tooling. Background Art
[0002] The molding process of fiber-wound composite materials is currently the most widely used, most efficient and best molding process. It has the characteristics of light weight, high strength and simple structure. It has higher strength and stronger resistance to high and low temperatures than traditional metal shells.
[0003] The carbon fiber composite shell is usually formed by winding sand cores. The carbon fiber composite winding process is to wind the continuous carbon fiber composite material impregnated with resin glue on the cylindrical sand core according to certain rules, and then solidify and demold it. In the prior art, the carbon fiber composite material is generally wound on a metal winding cylindrical sand core or sand core. The sand core has the advantages of light weight and simple structure. When demolding, it only needs to be rinsed with water to dissolve the sand core, which is convenient for demolding. In the process of preparing the sand core, the sand is usually placed in the tooling, vibrated to make the sand tighter, and then dried and demolded.
[0004] The existing sand core molding tooling easily causes the sand to be loose during molding, resulting in a situation where the sand core molding strength is low, and it is difficult to prepare sand cores of different shapes.
[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 purpose of the utility model is to provide a high-pressure composite material cylindrical sand core forming tool, which can solve the problems raised in the above-mentioned background technology.
[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 high-pressure composite material cylindrical sand core molding tool, comprising a supporting platform, a core shaft, a molding shell assembly and a cover plate, wherein the core shaft is installed at the upper end of the supporting platform, the molding shell assembly is installed at the upper end of the supporting platform and is located on the outer wall of the core shaft, a filling cavity is formed between the outer wall of the core shaft and the inner wall of the molding shell assembly, and the cover plate is installed at the upper end of the molding shell assembly, wherein the molding shell assembly includes a plurality of layers of molding shell groups, and the plurality of molding shell groups are sequentially installed on the supporting platform from bottom to top.
[0009] In one or more embodiments of the utility model, a limit block is installed between the core shaft and the molding shell assembly, the limit block is used to increase the stability of the core shaft, the limit block is provided with an arc contact surface matching the core shaft, and a lap protrusion is provided on one end surface of the limit block away from the arc contact surface, and the lap protrusion is fixedly connected between two adjacent upper and lower molding shell groups.
[0010] In one or more embodiments of the present utility model, the molded shell group includes a plurality of molded shells, and the plurality of molded shells form a closed-loop hollow structure. The upper and lower ends of the molded shells are respectively provided with first contact edges, and the upper and lower molded shells are detachably installed. The left and right ends of the first contact edges are respectively provided with second contact edges, and the left and right molded shells are detachably installed.
[0011] In one or more embodiments of the present invention, a protruding edge is provided on the relative contact surface of the second contact edge, and the protruding edge allows a gap to exist between the left and right molded shells, thereby improving the fixing strength by bolt fixing.
[0012] In one or more embodiments of the utility model, a plurality of second mounting holes are provided on the first contact edge, a second bolt matching the second mounting holes is installed on the first contact edge, the second bolt is used to fix the two first contact edges, a plurality of third mounting holes are provided on the second contact edge, a third bolt matching the third mounting holes is installed on the second contact edge, the third bolt is used to fix the two second contact edges, a plurality of fourth mounting holes matching the second mounting holes are provided on the cover plate, a fourth bolt is installed on the fourth mounting hole, and the fourth bolt is used to fix the cover plate and the first contact edge.
[0013] In one or more embodiments of the present invention, the upper end surface of the support platform is horizontally arranged, the lower end surface of the positioning ring is horizontally arranged, and the support platform and the core shaft are perpendicular to each other.
[0014] In one or more embodiments of the present invention, the inner diameter of the cover plate is equal to or smaller than the inner diameter of the core shaft, and the outer diameter of the cover plate is greater than or equal to the inner diameter of the molded shell assembly.
[0015] In one or more embodiments of the present invention, a plurality of connecting ears are installed on the upper end of the core shaft.
[0016] In one or more embodiments of the utility model, a positioning ring is fixedly connected to the lower end of the core shaft, a plurality of first positioning holes are fixedly connected to the positioning ring, a plug hole matching the core shaft is provided on the support platform, a first mounting hole matching the first positioning hole is provided on the upper end surface of the support platform, and a first bolt matching the first mounting hole and the first positioning hole is installed on the support platform.
[0017] Compared with the prior art, the utility model provides a high-pressure and high-strength composite material cylindrical sand core molding tool. The high-pressure and high-strength composite material cylindrical sand core molding tool is easy to disassemble, is fixed with bolts, and the worn parts can be replaced separately, thereby reducing the use cost of the molding tool. The method of use is simple, the production speed can be improved, and the frequency of damage to the cylindrical sand core is reduced, thereby reducing the production cost of the cylindrical sand core. The detachable molding shell facilitates the demolding of the cylindrical sand core, can make the cylindrical sand core more compact, improves the strength of the cylindrical sand core, and facilitates the preparation of sand cores of different shapes. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] 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.
[0019] Figure 1 This is a structural schematic diagram of a high-pressure composite material cylindrical sand core forming tooling in one embodiment of the utility model;
[0020] Figure 2 It is a cross-sectional view of a high-pressure composite material cylindrical sand core forming tool in one embodiment of the utility model;
[0021] Figure 3 for Figure 2 Schematic diagram of the structure at A in the middle;
[0022] Figure 4 It is a partial structural schematic diagram of a high-pressure composite material cylindrical sand core forming tooling in one embodiment of the utility model;
[0023] Figure 5 It is an exploded view of a high-pressure composite material cylindrical sand core forming tooling in one embodiment of the utility model;
[0024] Figure 6 This is a schematic structural diagram of a mandrel in one embodiment of the utility model;
[0025] Figure 7 The structure of the molded shell in one embodiment of the utility model is schematically shown. Figure 1 ;
[0026] Figure 8 The structure of the molded shell in one embodiment of the utility model is schematically shown. Figure 2 ;
[0027] Fig. 9 for Figure 8Schematic diagram of the structure at B in the middle;
[0028] Fig.10 This is a schematic diagram of the structure of a cover plate in one embodiment of the utility model;
[0029] Fig.11 This is a structural schematic diagram of a support platform in an embodiment of the utility model;
[0030] Fig.12 This is a schematic diagram of the structure of a limit block in an embodiment of the utility model;
[0031] Fig.13 The present invention is a flowchart of a method for manufacturing a high-pressure composite material cylindrical sand core in one embodiment of the present invention.
[0032] Description of main reference numerals:
[0033] 1. Support platform; 11. First mounting hole; 12. Plug-in hole; 2. Molded shell; 21. First contact edge; 211. Second mounting hole; 22. Second contact edge; 221. Third mounting hole; 23. Protruding edge; 3. Cover plate; 31. Fourth mounting hole; 4. Mandrel; 41. Positioning ring; 411. First positioning hole; 42. Connecting ear; 5. Filling layer; 6. Limiting block; 61. Arc contact surface; 62. Overlapping boss. DETAILED DESCRIPTION
[0034] 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.
[0035] A high-pressure composite material cylinder sand core molding tool in one embodiment of the utility model comprises a high-pressure composite material cylinder sand core molding tool and a manufacturing method of the high-pressure composite material cylinder sand core.
[0036] like Figures 1 to 12As shown, the high-pressure composite material cylindrical sand core forming tooling includes a support platform 1, a plug hole 12 is opened in the middle of the support platform 1, a core shaft 4 matching the plug hole 12 is installed on the support platform 1, and the core shaft 4 is inserted into the plug hole 12. A positioning ring 41 matching the upper end surface of the support platform 1 is installed on the core shaft 4, and a plurality of first positioning holes 411 are opened on the positioning ring 41, and a first mounting hole 11 matching the first positioning hole 411 is opened on the support platform 1. A first bolt matching the positioning ring 41 and the first mounting hole 11 is installed on the support platform 1. That is, the first bolt is used to fix the support platform 1 and the core shaft 4, and the core shaft 4 can be detachably installed on the upper end of the support platform 1. A plurality of connecting ears 42 are installed on the upper end of the core shaft 4, and the connecting ears 42 are used to hoist the core shaft 4.
[0037] To ensure the verticality of the core shaft 4, the upper end surface of the support platform 1 is set horizontally, and the lower end surface of the positioning ring 41 is also set horizontally. The core shaft 4 is installed on the support platform 1 through the positioning ring 41, which can ensure that the support platform 1 and the core shaft 4 are always vertical. As long as the support platform 1 is placed horizontally, the verticality of the core shaft 4 can be guaranteed, thereby ensuring that the manufactured cylindrical sand core meets the verticality requirements.
[0038] like Figures 1 to 12 As shown, a forming shell assembly is installed on the supporting platform 1, and a filling cavity is formed between the forming shell assembly and the core shaft 4. Sand is filled in the filling cavity to form a filling layer 5. The sand can be compacted and solidified by vibration to obtain a cylindrical sand core.
[0039] Specifically, Figures 1 to 9 As shown, the molding shell assembly is composed of a plurality of molding shell groups, and the plurality of molding shell groups are installed sequentially from bottom to top, and the molding shell group at the bottom is installed at the upper end of the support platform 1. When filling sand, a molding shell group can be installed on the support platform 1, and sand can be filled into the filling cavity and compacted, and then another molding shell group can be installed on the molding shell group at the upper end of the support platform 1, and sand can be filled again and compacted, and the above steps can be repeated according to the length requirements. One filling can be divided into multiple fillings and compacted separately. Compared with one filling and compacting, the compacting effect of the sand is better, thereby improving the molding strength of the cylindrical sand core.
[0040] Furthermore, if Figures 1 to 9As shown, the molding shell is a hollow closed-loop structure, and a filling cavity is formed between the molding shell and the core shaft 4. The molding shell group is composed of a plurality of molding shells 2, and adjacent molding shells 2 are installed with each other to form a closed loop and installed along the outer wall of the core shaft 4, and can be disassembled individually when demolding. The molding shell 2 is disassembled separately, and the molding shell 2 will not cause damage to the barrel sand core, and the situation of causing the barrel sand core during the demolding process can be avoided as much as possible. In particular, for sand cores with irregular shapes, the solidified barrel sand core cannot be directly taken out directly, and the molding shell 2 needs to be disassembled before the barrel sand core can be taken out. The molding shell 2 is detachable. When the molding shell 2 is worn, the molding shell 2 can be maintained, repaired and replaced separately, and the maintenance cost of the molding tooling during use can be reduced.
[0041] like Figure 7 to Figure 9 As shown, the upper and lower ends of the molded shell 2 are respectively provided with first contact edges 21, a plurality of second mounting holes 211 are opened on the first contact edge 21, a second bolt matching the second mounting hole 211 is installed on the first contact edge 21, and the second bolt is used to fix the two first contact edges 21. That is, the second bolt is used to fix the molded shell 2 in the upper and lower directions, and the connection between the first contact edge 21 and the first contact edge 21 is detachable. The left and right ends of the first contact edge 21 are respectively provided with second contact edges 22, a plurality of third mounting holes 221 are opened on the second contact edge 22, a third bolt matching the third mounting hole 221 is installed on the second contact edge 22, and the third bolt is used to fix the two second contact edges 22. That is, the third bolt is used to fix the molded shell 2 in the left and right directions, and the connection between the second contact edge 22 and the second contact edge 22 is detachable. That is, the molded shell 2 and the adjacent molded shell 2 are detachably installed.
[0042] like Figure 8-Figure 9 As shown, a protruding edge 23 is provided on the relative contact surface of the second contact edge 22, and the protruding edge 23 allows a gap between the left and right molded shells 2. When the molded shells 2 are fixed with the third bolt, due to the existence of the gap, when the third bolt is tightened, the squeezing force can be increased on the second contact edge 22, thereby increasing the stability of the fixation between the second contact edge 22 and the second contact edge 22. That is, the strength of the connection between the molded shells 2 in the left and right directions can be increased, so that the gap between the two molded shells 2 is smaller and the connection is tighter.
[0043] like Figure 1 to Figure 5 As shown, a cover plate 3 is installed at the upper end of the molded shell assembly, and the cover plate 3 can seal the filling cavity so that the sand is tightly present in the filling cavity. Generally, the inner diameter of the cover plate 3 is equal to or smaller than the inner diameter of the core shaft 4, and the outer diameter of the cover plate 3 is greater than or equal to the inner diameter of the molded shell assembly.
[0044] Specifically, Fig.10As shown, the cover plate 3 is provided with a plurality of fourth mounting holes 31 matching the second mounting holes 211, and fourth bolts are installed on the fourth mounting holes 31, and the fourth bolts are used to fix the cover plate 3 and the first contact edge 21. That is, the cover plate 3 is detachably mounted on the upper end of the molded shell assembly.
[0045] In order to ensure the stability of the mandrel 4 during the sand filling process, a limit block 6 is installed between the mandrel 4 and the molding shell assembly. The limit block 6 supports the mandrel 4 so that the mandrel 4 is not easily offset during the sand filling process, thereby avoiding as much as possible the quality of the cylindrical sand core caused by the offset of the mandrel 4. That is, the shape of the cylindrical sand core will not change. If the shape of the cylindrical sand core changes, the upper limit of the force on the relatively weak cylindrical sand core part will be reduced, and the cylindrical sand core may be damaged during the winding process, thereby affecting the preparation of the high-pressure composite material.
[0046] Specifically, Figures 1 to 12 As shown, the limit block 6 is provided with an arcuate contact surface 61 matching the mandrel 4, and a lap projection 62 is provided on one end surface of the limit block 6 away from the arcuate contact surface 61, and the lap projection 62 is fixedly connected between the upper and lower adjacent molded shell groups. The lap projection 62 can also be plugged between the adjacent molded shell groups by plugging, of course, this requires that a slot matching the lap projection 62 is provided on the molded shell group. The limit block 6 can fix the mandrel 4.
[0047] When installing the molding tool, first install the core shaft 4 on the support platform 1, then install a layer of molding shell group on the upper end of the support platform 1, install multiple limit blocks 6 on the upper end of a layer of molding shell group, install the second layer of molding shell group, and install the corresponding number of layers of molding shell groups according to actual needs. After the molding shell group is installed, fill the filling cavity with sand, and make the sand compact by vibration or other means. Then install the cover plate 3 on the uppermost molding shell group, and seal the filling cavity formed by the core shaft 4 and the molding shell group. After the molding tool filled with sand is cured, the mold can be removed to obtain a cylindrical sand core.
[0048] When the molding tool is demolded, the cover plate 3 is first removed from the molding shell group, and then the molding shell group is removed from top to bottom in sequence. When the molding shell group is removed, a single molding shell 2 is first removed, and then the molding shells 2 adjacent to each other on the left and right are removed. When one layer of molding shell 2 is completely removed, the next layer is removed. After the molding shell group is removed, the first bolt is unscrewed to disconnect the support platform 1 and the molding shell 2, and the cylindrical sand core can be obtained.
[0049] like Fig.13As shown, the manufacturing method of the high-pressure composite material cylindrical sand core, first, the core shaft 4 is installed on the support platform 1, and the first positioning hole 411 is aligned with the first mounting hole 11, and the support platform 1 and the core shaft 4 are fixed by the first bolt. The support platform 1 should be placed horizontally, and the support platform 1 should be placed on the inclined ground as much as possible. The molding shell 2 is installed on the support platform 1 along the outer side of the core shaft 4 to form a closed loop. A filling cavity is formed between the molding shell 2 and the core shaft 4, and then a plurality of limit blocks 6 are installed on the upper end of the molding shell 2, and then the molding shell 2 is installed on the upper end of the limit block 6. The limit blocks 6 are fixed by the two molding shells 2, and the limit blocks 6 are fixed to the core shaft 4. The above steps of installing the molding shell 2 and the limit blocks 6 are repeated according to the length of the cylindrical sand core. Sand is filled into the filling cavity formed by the molding shell 2 and the core shaft 4, and the sand in the filling cavity is compacted by vibration and pressurization. The height of the compacted sand will decrease. If the height of the sand is too low, it is necessary to continue to add sand and perform secondary compaction until the length of the sand meets the requirements. After the sand is compacted, the cover plate 3 is installed on the upper end of the molding shell 2, and the cover plate 3 realizes the sealing of the filling cavity.
[0050] Of course, after installing one layer of the molding shell group, sand can be filled into the cavity between the support platform 1 and the first layer of the molding shell group and compacted. The sand needs to be lower than the upper end surface of the molding shell group, leaving space for the limit block 6. Then the two-layer molding shell group is installed on the upper end of the limit block 6, and the two-layer and one-layer molding shell groups fix the limit block 6. Then fill the filling cavity formed by the two-layer molding shell group and the mandrel 4 with sand, compact it, and confirm the number of layers of the installed molding shell group according to the length of the cylindrical sand core, and repeat the above steps. When the sand filling is completed, the multi-layer sand core is compacted as a whole to further improve the compactness of the sand core.
[0051] Finally, after the barrel sand core is solidified and formed, the mold is removed and the barrel sand core is taken out.
[0052] The prepared cylindrical sand core only needs to be rinsed with water when it is dissolved, so that the sand cylindrical sand core can be dissolved, making demoulding convenient.
[0053] The molding tool of the utility model is easy to disassemble, and is fixedly connected by bolts. The worn parts can be replaced separately, which reduces the use cost of the molding tool. The method of use is simple, the production speed can be improved, and the frequency of damage to the cylindrical sand core is reduced, thereby reducing the production cost of the cylindrical sand core. The detachable molding shell 2 facilitates the demoulding of the cylindrical sand core. And it can be used for cylindrical sand cores of different shapes, which is more practical.
[0054] 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.
[0055] 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 high-pressure composite material cylindrical sand core forming tool, characterized in that: include: Support platform; A mandrel, the mandrel being mounted on the upper end of the supporting platform; A molded shell assembly, the molded shell assembly is mounted on the upper end of the support platform and is located on the outer wall of the mandrel, and a filling cavity is formed between the outer wall of the mandrel and the inner wall of the molded shell assembly; a cover plate mounted on an upper end of the molded housing assembly; Wherein, the molded shell assembly includes a plurality of molded shell groups, and the plurality of molded shell groups are sequentially installed on the support platform from bottom to top.
2. The high-pressure composite material cylinder sand core forming tooling according to claim 1 is characterized in that: A limit block is installed between the mandrel and the molding shell assembly, and the limit block is used to increase the stability of the mandrel; The limit block is provided with an arc-shaped contact surface matching the core shaft, and an overlap projection is provided on one end surface of the limit block away from the arc-shaped contact surface. The overlap projection is fixedly connected between two adjacent upper and lower molding shell groups.
3. The high-pressure composite material cylindrical sand core forming tooling according to claim 1 or 2, characterized in that: The molded shell group includes a plurality of molded shells, and the plurality of molded shells form a closed-loop hollow structure; The upper and lower ends of the molded shell are respectively provided with first contact edges, and the upper and lower molded shells are detachably installed; The left and right ends of the first contact edge are respectively provided with second contact edges, and the left and right molded shells are detachably installed.
4. The high-pressure composite material cylindrical sand core forming tool according to claim 3 is characterized in that: A protruding edge is arranged on the opposite contact surface of the second contact edge, and the protruding edge allows a gap to exist between the left and right molded shells, thereby improving the fixing strength by bolt fixing.
5. The high-pressure composite material cylinder sand core forming tooling according to claim 3 is characterized in that: A plurality of second mounting holes are formed on the first contact edge, and second bolts matching the second mounting holes are installed on the first contact edge, and the second bolts are used to fix the two first contact edges; A plurality of third mounting holes are formed on the second contact edge, and third bolts matching the third mounting holes are installed on the second contact edge, and the third bolts are used to fix the two second contact edges; The cover plate is provided with a plurality of fourth mounting holes matching the second mounting holes, and fourth bolts are installed on the fourth mounting holes, and the fourth bolts are used to fix the cover plate and the first contact edge.
6. The high-pressure composite material cylinder sand core forming tool according to claim 1, characterized in that: A positioning ring is fixedly connected to the lower end of the mandrel, and a plurality of first positioning holes are fixedly connected to the positioning ring; The support platform is provided with a plug-in hole matching the core shaft, and the upper end surface of the support platform is provided with a first mounting hole matching the first positioning hole; The support platform is provided with a first bolt which matches the first mounting hole and the first positioning hole.
7. The high-pressure composite material cylinder sand core forming tool according to claim 1, characterized in that: The inner diameter of the cover plate is equal to or smaller than the inner diameter of the core shaft, and the outer diameter of the cover plate is greater than or equal to the inner diameter of the molded shell component.
8. The high-pressure composite material cylindrical sand core forming tool according to claim 1, characterized in that: A plurality of connecting ears are installed on the upper end of the core shaft.
9. The high-pressure composite material cylindrical sand core forming tool according to claim 6, characterized in that: The upper end surface of the support platform is horizontally arranged, and the lower end surface of the positioning ring is horizontally arranged; The supporting platform and the core shaft are perpendicular to each other.