Sectional type screw linkage 3D sand core structure
Through segmented screw link 3D sand core structure and split core assembly design, the problem of brushing the complex structure of the inner cavity of 3D printed integrated molded castings is solved, and the strength and convenience of the core assembly are improved.
Patent Information
- Application Number
- CN202420899399.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-28
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-04-28
AI Technical Summary
The complex structure of the inner cavity of the 3D printed integrated shell casting makes it difficult to brush, have low strength and difficult to carry.
The 3D sand core structure is adopted for segmented screw linking. Through the coordination of the lower box and the upper box, the core component adopts a split structure design. The main core block and the secondary core block are integrated into the core, realizing the split manufacturing and disassembly of the core component.
While reducing the difficulty of brushing, it increases the strength of the core assembly, and can be lifted with side guide rods to improve convenience.
Smart Images
Figure CN222588044U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of casting, in particular to a segmented screw-linked 3D sand core structure. Background Art
[0002] 3D printing is a type of rapid prototyping technology, also known as additive manufacturing. It is a technology that uses digital model files as the basis and uses adhesive materials such as powdered metal or plastic to construct objects by printing layer by layer.
[0003] 3D printing is usually achieved by using digital technology material printers. It is often used to make models in the fields of mold manufacturing, industrial design, etc., and later gradually used for direct manufacturing of some products. There are already parts printed using this technology.
[0004] It is necessary to quickly develop a casing casting, and use 3D printing technology to speed up the development cycle. Due to the one-piece molding characteristics of 3D printing, it is difficult to brush the core with complex inner cavity structure. Now the one-piece core is processed in sections, and then the screw structure is used to connect the one-piece lower core, which reduces the difficulty of brushing and increases the core strength.
[0005] The one-piece core is difficult to paint by brush, has low strength and is difficult to carry. Therefore, we propose a segmented screw-linked 3D sand core structure. Utility Model Content
[0006] 1. Technical issues to be resolved
[0007] In view of the deficiencies in the prior art, the utility model provides a segmented screw-linked 3D sand core structure to solve the technical problem of difficulty in brushing an integrated structure core.
[0008] (II) Technical solution
[0009] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:
[0010] A segmented screw-linked 3D sand core structure, comprising
[0011] The lower box body and the upper box body are provided with a casting cavity inside, a core assembly is installed in the casting cavity, and the casting of the casing is completed by combining the injection molding cabin and the core assembly.
[0012] The lower box body and the upper box body are cooperatively connected, wherein three groups of positioning blocks are arranged at the four upper corners of the lower box body, and grooves are arranged at the corresponding positions of the upper box body. The positioning blocks are used to assemble and dock the lower box body and the upper box body to improve the efficiency of assembly.
[0013] The upper box body adopts a split structural design, and an upper connecting hole is arranged between the two sets of upper box bodies. By installing a limit pin in the upper connecting hole, the upper box body can be installed and split, which can enrich the splitting methods of the upper box body. The traditional upper box body can only be disassembled up and down, and the split upper box body can also be disassembled on the opposite side, which can be better compatible with the structure of the core assembly.
[0014] The core assembly includes a core main block and a core sub-block. A groove is arranged on the inner side of the core main block, and a threaded preset hole is arranged on the inner side of the core sub-block. The split assembly of the core main block and the core sub-block is completed by plugging the threaded preset hole into the groove of the core main block.
[0015] The thread preset hole is a square of a quadrangular prism, and the corresponding groove is a groove structure of a quadrangular prism. The rotation position of the core main block and the core auxiliary block is limited by the structure of the thread preset hole.
[0016] Two groups of positioning blocks are arranged on the outside of the core sub-block. The positioning blocks are snap-fitted into the casting cavity of the lower box body. The protrusions of the limit blocks correspond to the make-shift grooves in the lower box body. The corresponding limit blocks are snap-fitted with the lower box body to realize the rapid positioning of the core sub-block in the lower box body and improve the accuracy and convenience of installation.
[0017] Side guide rods are installed inside the core main block and the core auxiliary block, and the side guide rods are fixed in the core main block and the core auxiliary block by bolts on both sides. The side guide rods can be lifted as a whole for the core assembly, which is convenient for overall lifting and assembly.
[0018] (III) Beneficial effects
[0019] The lower box and the upper box are formed by 3D printing, and the mold is abandoned to reduce the development cycle. Due to the one-piece molding characteristics of 3D printing, it is difficult to brush the core with complex inner cavity structure. The core assembly and the box are manufactured separately and can be disassembled to meet the requirements of painting. The core assembly includes a core main block and a core sub-block, which adopts a split structure design, and then the side guide rods are used to lower the core main block and the core sub-block as a whole, which reduces the difficulty of brushing while increasing the strength of the core assembly. The side guide rods can be used for lifting to improve convenience. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings.
[0021] Figure 1 The utility model is a segmented screw connecting the overall structure of the 3D sand core structure Figure 1 ;
[0022] Figure 2 The utility model is a three-dimensional structure of a segmented screw connecting a 3D sand core structure. Figure 2 ;
[0023] Figure 3 This is an appearance structural diagram of a segmented screw-connected 3D sand core structure of the utility model;
[0024] Figure 4 This is an exploded view of the inner molding block in a segmented screw-connected 3D sand core structure of the utility model;
[0025] Figure 5 It is a stereoscopic diagram of an inner molding block in a segmented screw-linked 3D sand core structure of the utility model.
[0026] Legend:
[0027] 1. Lower box; 2. Upper box;
[0028] 3. Core assembly; 31. Core main block; 32. Core auxiliary block; 33. Side guide rod; 34. Positioning block; 35. Threaded preset hole;
[0029] 4. Upper connecting hole; 5. Limit block. DETAILED DESCRIPTION
[0030] The embodiment of the present application solves the problem of difficulty in brushing the core with an integrated structure in the prior art by providing a segmented screw-linked 3D sand core structure. The core assembly includes a core main block and a core auxiliary block, which adopt a split structural design, and then use side guide rods to integrate the core main block and the core auxiliary block into the core, thereby reducing the difficulty of brushing while increasing the strength of the core assembly.
[0031] Example 1
[0032] like Figure 1-3 As shown, the technical solution in the embodiment of the present application is to solve the problem that the above-mentioned integrated structure core is difficult to paint by brush, and the overall idea is as follows:
[0033] In view of the problems existing in the prior art, the utility model provides a segmented screw-linked 3D sand core structure, including a lower box body 1 and an upper box body 2, wherein a casting cavity is provided inside the lower box body 1 and the upper box body 2, and a core assembly 3 is installed in the casting cavity, and the casting of the casing is completed by combining the injection molding chamber and the core assembly 3.
[0034] The lower box body 1 and the upper box body 2 are cooperatively connected, wherein three groups of limit blocks 5 are arranged at the four upper corners of the lower box body 1, and grooves are arranged at the corresponding positions of the upper box body 2. The limit blocks 5 are used to assemble and dock the lower box body 1 and the upper box body 2 to improve the efficiency of assembly.
[0035] The upper box body 2 adopts a split structural design, and an upper connecting hole 4 is set between the two groups of upper box bodies 2. By installing a limit pin in the upper connecting hole 4, the upper box body 2 can be installed and disassembled, which can enrich the disassembly method of the upper box body 2. The traditional upper box body 2 can only be disassembled up and down, and the split upper box body 2 can also be disassembled on the opposite side, which can be better compatible with the structure of the core assembly 3.
[0036] like Figure 4-5 As shown, the core assembly 3 includes a core main block 31 and a core auxiliary block 32. A groove is provided on the inner side of the core main block 31, and a threaded preset hole 35 is provided on the inner side of the core auxiliary block 32. By snapping the threaded preset hole 35 into the groove of the core main block 31, the split assembly of the core main block 31 and the core auxiliary block 32 is completed.
[0037] The thread preset hole 35 is a square of a quadrangular prism, and the corresponding groove is a groove structure of a quadrangular prism. The rotational position of the core main block 31 and the core auxiliary block 32 is limited by the structure of the thread preset hole 35.
[0038] Two groups of positioning blocks 34 are arranged on the outside of the core sub-block 32. The positioning blocks 34 are snap-fitted into the casting cavity of the lower box body 1. The protrusions of the positioning blocks 34 correspond to the clearance grooves in the lower box body 1. The corresponding positioning blocks 34 are snap-fitted with the lower box body 1 to achieve rapid positioning of the core sub-block 32 in the lower box body 1, thereby improving the accuracy and convenience of installation.
[0039] Side guide rods 33 are installed inside the core main block 31 and the core auxiliary block 32. The side guide rods 33 are fixed in the core main block 31 and the core auxiliary block 32 by bolts on both sides. The side guide rods 33 can be lifted as a whole for the core assembly 3, which is convenient for overall lifting and assembly.
[0040] The lower box body 1 and the upper box body 2 are formed by 3D printing, and mold opening is abandoned to reduce the development cycle. Due to the characteristics of 3D printing integrated molding, it is difficult to brush the core with a complex inner cavity structure. The core component 3 and the box body are manufactured separately and can be disassembled to meet the requirements of painting. The core component 3 includes a core main block 31 and a core auxiliary block 32 with a split structure design, and the side guide rod 33 is used to integrate the core main block 31 and the core auxiliary block 32 into a core, which reduces the difficulty of brushing and increases the strength of the core component 3. The side guide rod 33 can be used for lifting to improve convenience.
[0041] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.
Claims
1. A segmented screw-linked 3D sand core structure, characterized in that: A lower box body (1) and an upper box body (2), wherein a casting cavity is arranged inside the lower box body (1) and the upper box body (2), and a core assembly (3) is installed in the casting cavity. The casting of the casing is completed by combining the injection molding chamber and the core assembly (3). The core assembly (3) includes a core main block (31) and a core auxiliary block (32). A groove is arranged on the inner side of the core main block (31), and a threaded preset hole (35) is arranged on the inner side of the core auxiliary block (32). The threaded preset hole (35) is snapped into the groove of the core main block (31).
2. A segmented screw-linked 3D sand core structure as claimed in claim 1, characterized in that: The thread preset hole (35) is a square of a quadrangular prism, and the corresponding groove is a groove structure of a quadrangular prism. The rotational position of the core main block (31) and the core auxiliary block (32) is limited by the structure of the thread preset hole (35).
3. A segmented screw-linked 3D sand core structure as claimed in claim 2, characterized in that: Two groups of positioning blocks (34) are arranged on the outside of the core auxiliary block (32). The positioning blocks (34) are snap-fitted and installed in the casting cavity of the lower box body (1). The protrusions of the positioning blocks (34) correspond to the clearance grooves in the lower box body (1), and the corresponding positioning blocks (34) are snap-fitted with the lower box body (1).
4. A segmented screw-linked 3D sand core structure as claimed in claim 3, characterized in that: Side guide rods (33) are installed inside the core main block (31) and the core auxiliary block (32), and the side guide rods (33) are fixed in position in the core main block (31) and the core auxiliary block (32) by bolts on both sides.
5. The segmented screw-linked 3D sand core structure according to claim 1, characterized in that: The lower box body (1) and the upper box body (2) are connected in a matching manner, wherein three groups of limit blocks (5) are arranged at the four upper corners of the lower box body (1), and corresponding grooves are arranged at the upper box body (2), and the lower box body (1) and the upper box body (2) are assembled and docked by means of the limit blocks (5).
6. A segmented screw-linked 3D sand core structure as claimed in claim 5, characterized in that: The upper box body (2) adopts a split structure design, and an upper connection hole (4) is provided between two groups of upper box bodies (2), and a limit pin is installed in the upper connection hole (4).