High-precision casting exhaust device manufactured by adopting 3D sand mold printing method

Abstract

The invention relates to the technical field of casting exhaust, and discloses a high-precision casting exhaust device manufactured through a 3D sand mold printing method, the high-precision casting exhaust device comprises a module assembly, the module assembly is composed of a casting surface module assembly, a middle channel module and an outer side face module, and a hollow ventilation structure is formed in the module assembly; a flexible ventilation structure located on the right side of the hollow ventilation structure is fixedly installed on the right side of the module assembly, and a protruding block is fixedly installed on the side, away from the flexible ventilation structure, of the module assembly. Through the cooperation of the module assembly, the hollow ventilation structure and the flexible ventilation structure, the control problem of the gas flowing direction is effectively solved through the arrangement of the hollow ventilation structure and the flexible ventilation structure, the communication mode of the hollow ventilation structure and the flexible ventilation structure is adopted, and under the condition that the shape of a casting is not affected, the casting quality is improved. And meanwhile, molten iron is prevented from leaking out of the cavity.

Description

Technical Field

[0001] The present invention relates to the technical field of casting exhaust technology, and in particular to a high-precision casting exhaust device manufactured by a 3D sand mold printing method. Background Art

[0002] Sand casting refers to a casting method that produces castings in sand molds. Steel, iron and most non-ferrous alloy castings can be obtained by sand casting. Since the molding materials used in sand casting are cheap and easy to obtain, the mold is simple to manufacture, and it can adapt to single-piece production, batch production and mass production of castings, it has long been the basic process in casting production.

[0003] However, for complex castings produced by sand casting methods, there have always been difficulties in design and production in the discharge of gas from the cavity, core and inside the molten metal, as well as the guidance of the gas flow direction during the exhaust process. There are also difficulties in operation stability, difficulty in controlling the gas flow direction, insufficient gas discharge, and a trade-off between the dilemma of low gas discharge efficiency leading to gas defects and the escape of molten metal from the cavity leading to casting failure. Existing methods such as ventilation ropes and low-density fillers are limited by factors such as operation stability, uncontrollable gas discharge direction and discharge volume. Casting products often have quality problems such as air entrapment, pores and even defects. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a high-precision casting exhaust device made by a 3D sand mold printing method, which has the advantages of preventing molten metal from escaping from the mold cavity, lengthening the flow distance required for the molten metal to escape from the mold cavity, and promoting the efficient discharge of gas in the mold cavity and the metal liquid, thereby solving the problems raised in the above-mentioned background technology.

[0005] The present invention provides the following technical solution: a high-precision casting exhaust device made by a 3D sand mold printing method, comprising a module assembly, wherein the module assembly is composed of a casting surface module assembly, an intermediate channel module and an outer side module, a hollow ventilation structure is provided inside the module assembly, a flexible ventilation structure located on the right side of the hollow ventilation structure is fixedly installed on the right side of the module assembly, a protrusion is fixedly installed on the side of the module assembly away from the flexible ventilation structure, corresponding slot assemblies are provided on the upper and lower sides of the intermediate channel module, and a groove is provided on the left side of the outer side module.

[0006] Preferably, limit blocks are fixedly installed on both the upper and lower sides of the casting surface module assembly, and positioning blocks are fixedly connected to both the front and rear sides of the casting surface module assembly.

[0007] Preferably, the intermediate channel module comprises an upper end block, a middle block and a lower bottom block, the lower end surface of the upper end block is fixedly connected to the upper end of the middle block, and the side of the middle block away from the upper end block is fixedly connected to the upper end of the lower bottom block.

[0008] Preferably, the left side of the outer side module is connected to the right side of the middle channel module through an active snap-fitting groove, and the left side of the middle channel module is connected to the right side of the casting surface module assembly through an active snap-fitting block on the right side.

[0009] Preferably, the hollow ventilation structure comprises a left end channel, the right end of the left end channel is fixedly connected with a three-pronged channel, and the right end of the three-pronged channel away from the left end channel is fixedly installed with a right end channel.

[0010] Preferably, the slot assembly comprises an upper slot and a lower slot, the upper slot is provided on the upper end surface of the upper end block, and the lower slot is provided on the lower bottom surface of the lower bottom block.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. The present invention effectively solves the problem of controlling the gas flow direction by coordinating the module components, the hollow ventilation structure and the flexible ventilation structure, and adopts the connection method of the hollow ventilation structure and the flexible ventilation structure to improve the exhaust efficiency without affecting the shape of the casting, while preventing molten iron from leaking out of the cavity.

[0013] 2. The present invention realizes the effect of rapid gas flow by setting up the left end channel, the three-pronged channel, the right end channel and the flexible ventilation structure, and utilizes the setting of the three-pronged channel, effectively solving the problem of gas flow rate. The three-pronged channel is used to connect the left end channel and the right end channel, which speeds up the flow speed and flow rate of the gas, thereby improving the exhaust effect of the hollow ventilation structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the present invention;

[0015] Figure 2 It is a side view of the front ventilation duct of the present invention;

[0016] Figure 3 is a side view of the intermediate channel module of the present invention;

[0017] Figure 4 It is a side view of the outer side module of the present invention.

[0018] In the figure: 1. module assembly; 101. casting surface module assembly; 102. middle channel module; 1021. upper end block; 1022. middle block; 1023. lower bottom block; 103. outer side module; 2. hollow ventilation structure; 201. front ventilation channel; 2011. left end channel; 2012. three-pronged channel; 2013. right end channel; 202. middle ventilation channel; 203. rear ventilation channel; 3. protrusion; 4. slot assembly; 401. upper slot; 402. lower slot; 5. groove; 6. flexible ventilation structure; 7. limit block; 8. positioning block. DETAILED DESCRIPTION

[0019] 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 the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1 and Figure 3 A high-precision casting exhaust device made by a 3D sand mold printing method includes a module component 1, which is composed of a casting surface module component 101, an intermediate channel module 102 and an outer side module 103. A hollow ventilation structure 2 is provided inside the module component 1. The setting of the hollow ventilation structure 2 can form an efficient and complex exhaust structure inside, lengthen the flow distance required for the molten metal to escape from the cavity, and prevent the molten metal from escaping from the cavity. A flexible ventilation structure 6 located on the right side of the hollow ventilation structure 2 is fixedly installed on the right side of the module component 1. The modular design of the exhaust The gas device is assembled into the required shape and size as required during casting. During pouring, the gas passes smoothly through the specially designed exhaust structure of the device, first exhausting the cavity gas during filling, and then the metal liquid forms the casting normally on the surface of the device. The gas in the metal liquid is discharged from the cavity through the device, and finally the metal liquid solidifies to form a high-quality casting with low gas defects. A protrusion 3 is fixedly installed on the side of the module component 1 away from the flexible ventilation structure 6, and the upper and lower sides of the middle channel module 102 are provided with corresponding slot components 4, and the left side of the outer side module 103 is provided with a groove 5.

[0021] Limiting blocks 7 are fixedly installed on the upper and lower sides of the casting surface module assembly 101, and positioning blocks 8 are fixedly connected on the front and rear sides of the casting surface module assembly 101. The casting surface module assembly 101 is designed according to the shape of the casting with the surface close to the casting surface. A cylindrical hole is set on the joint surface, and the latter is divided into four arc pipes of equal diameter. The ends are merged again to form a connecting pipe area with the middle channel module.

[0022] The intermediate channel module 102 includes an upper end block 1021, an intermediate block 1022, and a lower bottom block 1023. The lower end surface of the upper end block 1021 is fixedly connected to the upper end of the intermediate block 1022, and the side of the intermediate block 1022 away from the upper end block 1021 is fixedly connected to the upper end of the lower bottom block 1023. The intermediate channel module 102 adopts a reciprocating channel design. If the molten metal overflows into the intermediate channel module, it flows in the reciprocating channel, which greatly increases the flow distance and avoids escaping from the cavity.

[0023] The left side of the outer side module 103 and the right side of the middle channel module 102 are connected by the movable clamping of the groove 5, and the left side of the middle channel module 102 and the right side of the casting surface module assembly 101 are connected by the movable clamping of the right protrusion 3. The outer side module 103 adopts a cylindrical hole to be first divided into four arc-shaped pipes, and the ends are aggregated. The diameter of the end position is designed according to the required ventilation rope diameter, and a flexible ventilation structure 6 is inserted at the end to ensure that the gas is smoothly discharged from the cavity.

[0024] See also Figure 2 and Figure 4 The hollow ventilation structure 2 includes a left end channel 2011, and the right end of the left end channel 2011 is fixedly connected with a three-pronged channel 2012. The setting of the three-pronged channel 2012 serves to connect the left end channel 2011 with the right end channel 2013. The right end of the three-pronged channel 2012 away from the left end channel 2011 is fixedly installed with the right end channel 2013.

[0025] The card slot assembly 4 includes an upper card slot 401 and a lower card slot 402. The upper card slot 401 is opened on the upper end surface of the upper end block 1021, and the upper end block 1021 provides a platform for the opening of the upper card slot 401. The lower card slot 402 is opened on the lower bottom surface of the lower bottom block 1023, and the lower bottom block 1023 provides a platform for the opening of the lower card slot 402.

[0026] Working principle: When in use, first, starting from the mold surface, i.e., the cavity surface, place the casting surface module assembly 101 according to needs, assemble the intermediate channel modules 102 one by one until close to the outer surface of the mold, and place the outer side module 103. Then, the hollow ventilation structure 2 and the flexible ventilation structure 6 in the outer side module 103 are connected to the outside of the mold to connect with the outside air, maintain the position of the device, and complete the molding and other tasks normally. Finally, during the pouring process, the gas is efficiently discharged from the mold from the device to obtain a casting with low gas defects.

[0027] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. At the same time, in the drawings of the present invention, the fill pattern is only for distinguishing layers, without any other limitation.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-precision casting exhaust device manufactured by a 3D sand mold printing method, comprising a module assembly (1), characterized in that: The module assembly (1) is composed of a casting surface module assembly (101), an intermediate channel module (102) and an outer side module (103); a hollow ventilation structure (2) is provided inside the module assembly (1); a flexible ventilation structure (6) located on the right side of the hollow ventilation structure (2) is fixedly installed on the right side of the module assembly (1); a protrusion (3) is fixedly installed on the side of the module assembly (1) away from the flexible ventilation structure (6); corresponding slot assemblies (4) are provided on the upper and lower sides of the intermediate channel module (102); and a groove (5) is provided on the left side of the outer side module (103).

2. A high-precision casting exhaust device manufactured by a 3D sand mold printing method according to claim 1, characterized in that: Limit blocks (7) are fixedly installed on both the upper and lower sides of the casting surface module assembly (101), and positioning blocks (8) are fixedly connected to both the front and rear sides of the casting surface module assembly (101).

3. The high-precision casting exhaust device manufactured by 3D sand printing method according to claim 1, characterized in that: The intermediate channel module (102) comprises an upper end block (1021), an intermediate block (1022), and a lower bottom block (1023); the lower end surface of the upper end block (1021) is fixedly connected to the upper end of the intermediate block (1022); and the side of the intermediate block (1022) away from the upper end block (1021) is fixedly connected to the upper end of the lower bottom block (1023).

4. The high-precision casting exhaust device manufactured by 3D sand printing method according to claim 1, characterized in that: The left side of the outer side module (103) is movably connected to the right side of the middle channel module (102) via a groove (5), and the left side of the middle channel module (102) is movably connected to the right side of the casting surface module assembly (101) via a right side protrusion (3).

5. The high-precision casting exhaust device manufactured by 3D sand printing method according to claim 1, characterized in that: The hollow ventilation structure (2) comprises a left end channel (2011), the right end of the left end channel (2011) is fixedly connected to a three-pronged channel (2012), and the right end of the three-pronged channel (2012) away from the left end channel (2011) is fixedly installed with a right end channel (2013).

6. The high-precision casting exhaust device manufactured by 3D sand printing method according to claim 1, characterized in that: The card slot assembly (4) comprises an upper card slot (401) and a lower card slot (402); the upper card slot (401) is provided on the upper end surface of the upper end block (1021), and the lower card slot (402) is provided on the lower bottom surface of the lower bottom block (1023).

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