Core-containing lower die for hollow frame metal casting

Abstract

The invention discloses a core-containing lower die for hollow frame metal casting, which is characterized in that a plurality of lower die blocks are combined to form the lower die, gaps are formed among the lower die blocks, casting grooves are formed on the lower die blocks, the casting grooves on the lower die blocks are combined to form a complete lower die casting groove, and liquid blocking devices are arranged among the gaps of the die blocks to prevent casting liquid from leaking out of the casting grooves. Rolling or static pressure supports are arranged below all the modules, so that all the lower modules move smoothly, the inner side edges of all the casting grooves jointly form the appearance of the compressible mold core, reusable hard materials can be used as the lower mold and the mold core, the production efficiency is improved, pollution caused by using a sand core and the mold core is eliminated, and the casting cost is effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of castings, specifically a core-containing lower mold for casting hollow frame-type metals. Background Technology

[0002] Castings are like Figure 1 The hollow frame-shaped part shown has a rectangular cross-section as shown in the figure. The existing technology method uses... Figure 2 and Figure 3 The lower mold is used for casting as shown. Figure 2 This is a top view of the casting lower mold. Figure 3 The problem with the lower mold section view is that the inner core of the lower mold will prevent the shrinkage of the casting during solidification. It is necessary to use shrinkable sand mold for molding, and it is not possible to use rigid materials such as metal molds. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides a core-containing lower mold for hollow frame metal casting, which effectively overcomes the shortcomings of existing technologies.

[0004] The present invention is achieved through the following technical solution: a core-containing lower mold for hollow frame metal casting, which is composed of two or more lower modules. Each lower module has a casting groove, and the casting grooves on each lower module are assembled to form a complete casting groove for the lower mold. There is a gap between each lower module, and a liquid-blocking device is provided between the gaps to prevent the casting liquid from leaking out of the gaps. Each lower module is mounted on a rolling or hydrostatic support guide rail. Each lower module can move in a direction parallel to the heat shrink plane. There are removable mutual positioning devices between each lower mold.

[0005] As a preferred technical solution, the gaps between each lower module are filled with fireproof cotton.

[0006] As a preferred technical solution, the fireproof cotton filling is aluminum silicate cotton or porous silica heat insulation cotton.

[0007] As a preferred technical solution: there are U-shaped external liquid-blocking plates between each lower module, which are respectively locked on the sides and bottom of the two adjacent lower modules.

[0008] As a preferred technical solution: the gap between each lower module is provided by a U-shaped internal liquid-blocking plate, which is respectively stuck in the inner and outer sides and bottom edge of the casting groove of the two adjacent lower modules.

[0009] As a preferred technical solution: each lower mold and the base are provided with a rolling plane, and there is a rolling element between the two rolling planes.

[0010] As a preferred technical solution, each lower module is equipped with a cross-shaped combination rolling guide or a hydrostatic guide.

[0011] As a preferred technical solution, there is a combination of positioning plate and positioning pin, and each lower module has positioning pin holes.

[0012] As a preferred technical solution, a combination of positioning plates and positioning strips is provided, with the positioning strips embedded in the gaps between each lower module.

[0013] As a preferred technical solution: when the heat shrinkable plane is not parallel to the horizontal plane, the lower module at the lower end is positioned by a lateral positioning block.

[0014] The beneficial effects of this invention are as follows: a lower mold is formed by assembling several lower modules, with gaps between each lower module and casting grooves on each lower module. The casting grooves on each lower module are combined to form a complete casting groove for the lower mold. Liquid blocking devices are provided between the modules to prevent molten casting from leaking out of the casting groove. Rolling or hydrostatic supports are provided under each module to ensure smooth movement of each lower module. The inner sides of each casting groove together form the shape of a compressible core. Reusable hard materials can be used as the lower mold and core, which improves production efficiency, eliminates pollution from using sand cores, and effectively reduces casting costs. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the hollow frame casting of the present invention;

[0017] Figure 2 This is a top view of the lower mold of the hollow frame casting of the present invention;

[0018] Figure 3 This is a sectional view of the lower mold of the hollow frame casting of the present invention;

[0019] Figure 4 This is a top view of the lower mold assembly of the hollow frame casting of the present invention;

[0020] Figure 5 This is a sectional view of the lower mold assembly of the hollow frame casting of the present invention;

[0021] Figure 6 This is a top view of the hollow lower mold assembly for the hollow frame casting of the present invention;

[0022] Figure 7 This is a cross-sectional view of the hollow lower mold assembly for the hollow frame casting of the present invention;

[0023] Figure 8 This is a side view showing the relationship between the lower module and the hydraulic base of the present invention;

[0024] Figure 9This is a top view showing the relationship between the lower module and the hydraulic base of the present invention;

[0025] Figure 10 This is a top view of the bidirectional linear rolling guide rail assembly of the present invention;

[0026] Figure 11 This is a side view of the double-line linear rolling guide rail assembly of the present invention;

[0027] Figure 12 This is a schematic diagram of the end view of the bidirectional linear rolling guide rail assembly of the present invention;

[0028] Figure 13 This is a top view of the combined lower mold and the refractory material for the gap between the lower modules of the present invention;

[0029] Figure 14 This is a side view of the refractory material used for the combined lower mold and lower module gap of the present invention.

[0030] Figure 15 This is a schematic diagram showing the positional relationship between the combined lower mold and the outer liquid-blocking plate of the lower module gap in this invention;

[0031] Figure 16 This is a top view showing the positional relationship between the combined lower mold and the outer liquid-blocking plate of the lower module gap in this invention;

[0032] Figure 17 This is a schematic diagram showing the positional relationship of the liquid-blocking plate within the gap between the combined lower mold and the lower module of the present invention;

[0033] Figure 18 This is a schematic diagram showing the positional relationship between the combined lower mold, roller, and base of the present invention;

[0034] Figure 19 This is a schematic diagram showing the positional relationship between the combined lower mold and the bidirectional linear rolling guide rail of the present invention;

[0035] Figure 20 This is a schematic diagram of the lower module of the present invention with positioning pin holes;

[0036] Figure 21 This is a schematic diagram of the positioning plate with positioning pins according to the present invention;

[0037] Figure 22 This is a schematic diagram of the pre-casting assembly of the lower mold, the rolling device, and the positioning plate of the present invention.

[0038] Figure 23 This is a top view of the hollow frame casting with weight-reducing grooves of the present invention;

[0039] Figure 24 This is a cross-sectional view of the hollow frame casting with weight-reducing grooves of the present invention;

[0040] Figure 25 This is a schematic diagram of the arrangement of the weight-reducing groove core of the present invention;

[0041] Figure 26 Top view of the positioning plate with positioning strip of the present invention;

[0042] Figure 27 A side view of the positioning plate with positioning strips according to the present invention;

[0043] Figure 28 This is a schematic diagram of the pre-casting assembly of the lower mold with a rolling device and positioning strips according to the present invention;

[0044] Figure 29 This is a schematic diagram of the inclined casting with two planes of the present invention;

[0045] Figure 30 This is a schematic diagram of the assembly of the lower mold before casting the inclined base of the present invention.

[0046] Explanation of reference numerals in the attached figures:

[0047] 1. Hollow frame castings; 101. Hollow frame castings with weight-reducing grooves; 1001. Casting body with gap between molds and external liquid-blocking plate; 102. Weight-reducing groove; 2. Lower mold; 201. Lower mold inner core; 3. Combined lower mold module; 301. Combined lower mold inner hollow module; 3011. Inner hollow side of the inner hollow module; 302. Positioning pin hole of the combined lower mold module; 303. Casting groove; 3031. Inner side of the casting groove; 3032. Outer side of the casting groove; 3033. Bottom edge of the casting groove; 4. Base; 5. Spherical roller; 601. Linear rolling guide rail base; 602. Linear rolling guide rail intermediate moving guide rail; 603. Linear rolling guide rail upper moving guide rail; 7. Refractory filler for the gap between lower modules; 8. Outer liquid-blocking plate for the gap between lower modules; 9. Inner liquid-blocking plate for the gap between lower modules; 10. Positioning plate; 11. Positioning pin; 12. Core; 13. Connecting rod; 14. Lifting guide rail; 15. Positioning strip; 16. Non-parallel castings on the upper and lower surfaces; 17. Inclined base; 18. Inclined base module backing. Detailed Implementation

[0048] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0049] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0050] In the description of this invention, it should be understood that the terms "one end", "the other end", "outer side", "upper", "inner side", "horizontal", "coaxial", "center", "end", "length", "outer end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0051] Furthermore, in the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0052] The terms used in this invention, such as “above,” “over,” “below,” and “under,” indicating spatial relative position, are for illustrative purposes to describe the relationship of one unit or feature relative to another unit or feature as shown in the accompanying drawings. The terms of spatial relative position may be intended to include different orientations of the device in use or operation other than those shown in the figures. For example, if the device in the figures is flipped, a unit described as being “below” or “under” other units or features would be located “above” other units or features. Therefore, the exemplary term “under” can encompass both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or otherwise) and the spatially related descriptive terms used herein shall be interpreted accordingly.

[0053] In this invention, unless otherwise explicitly specified and limited, the terms "set," "socket," "connect," "through," and "plug-in" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0054] Example 1

[0055] Will Figure 2 and Figure 3 The casting lower mold is cut open, as shown Figure 4 and Figure 5 As shown, Figure 4 The image shows the combined lower mold module 3. Four combined lower mold modules 3 form a combined lower mold. In this embodiment, the heat shrink plane is... Figure 5 and Figure 7 In the XX plane, there is a gap L between each combined lower mold module 3, and the gap L is filled with refractory compressible filler, such as... Figure 13 and Figure 14 As shown, Figure 13 This is a top view of the filler and the combined lower mold. Figure 14 This is a side view. In this embodiment, aluminum silicate cotton or porous vacuum silica cotton is used to prevent the casting liquid from leaking out through the gaps between the lower mold modules 3 in the assembly of each module. Figure 8 The rolling elements shown support each of the combined lower mold modules 3. Figure 8 The base 4 has spherical rollers 5, and the spherical rollers 5 support the combined lower mold module 3, so that the combined lower mold module 3 can move with low resistance. Figure 9 This is a top view of the spherical roller 5, the base 4, and the combined lower mold module 3. The positional relationship of each module plus the bottom rolling element is as follows: Figure 18 As shown, the combined lower mold module 3 is placed on the spherical rollers 5, and each spherical roller 5 is fixed on the plane of the base 4. The combined lower mold module 3 also has the following features: Figure 20 The positioning pin hole 302 of the combined lower mold module shown is as follows: Figure 21 The positioning plate 10 and positioning pin 11 are shown together. The positional relationship after the positioning plate 10 is added is as follows: Figure 22 As shown, Figure 22 for Figure 18 Add to the basis Figure 20 The combined lower mold module positioning pin hole 302, plus Figure 21 The positioning plate 10 and positioning pin 11, the lower mold assembly as follows Figure 22 As shown, molten metal can be poured into the lower mold groove. After the molten metal is poured, the locating pin 11 and locating plate 10 assembly is removed. When the molten metal begins to solidify and shrink, each module of the lower mold assembly 3 can automatically follow the movement under the support of the spherical roller 5. The refractory filler 7 between the lower mold modules 3 can be compressed, reducing the distance L between the lower mold modules 3. This prevents the rigid lower mold modules 3 from hindering the shrinkage of the casting, thus avoiding hot cracking of the casting. Compared with existing technologies, this is as follows: Figure 2 and Figure 3 The lower mold core 201 in the present invention prevents the solidification and shrinkage of the molten casting. The lower mold core 201 can only be made of sandy material, while the present invention can be made of steel or other non-shrinkable and non-collapseable hard materials.

[0056] Example 2

[0057] Unlike Embodiment 1, the combined lower mold module 3 is supported by a rolling guide rail, such as... Figures 10-12 As shown, it consists of a linear rolling guide base 601, a linear rolling guide intermediate moving guide 602, and a linear rolling guide upper moving guide 603. Figure 10 It is a top view. Figure 11 It is a side view. Figure 12 This is an end view; the intermediate moving guide rail 602 of the linear rolling guide is supported by the linear rolling guide base 601. Figure 10 As shown, the linear rolling guide moves in the X direction, and the moving guide 603 on the upper linear rolling guide is supported by the middle moving guide 602 of the linear rolling guide. Figure 10 The movement in the Y direction, each combined lower mold module 3 is supported by an independent linear rolling guide rail 603, and the positional relationship of the combined lower mold after assembly is as follows: Figure 19 As shown, the combined lower mold module 3 is installed on the upper moving guide rail 603 of the linear rolling guide rail. The upper moving guide rail 603 of the linear rolling guide rail can roll linearly on the middle moving guide rail 602 of the linear rolling guide rail. The middle moving guide rail 602 of the linear rolling guide rail can roll linearly on the base 601 of the linear rolling guide rail. The gap between the combined lower mold modules 3 is filled with refractory filler 7 between the lower modules.

[0058] Example 3

[0059] Unlike the above embodiments, the gap liquid-blocking method between the lower mold module 3 of each module combination is as follows: Figure 15 As shown, by Figure 6 and Figure 7 The assembly shown is based on the lower mold inner hollow module 301, with the addition of an outer liquid-resistant plate 8 for the gap between the upper and lower modules. Figure 16 This is a partial top view. The outer liquid-blocking plate 8 between the lower modules is U-shaped, with its two sides attached to the combined lower mold module 3, the outer side and the inner hollow side 3011 of the inner hollow module, and its bottom attached to the bottom of the combined lower mold inner hollow module 301. When molten metal is poured into the lower mold, the three sides of the outer liquid-blocking plate 8 between the lower modules surround the two sides and the bottom of the gap between the combined lower mold modules 3 to prevent molten metal from leaking out. Figure 16 The outer liquid-blocking plate in the mold gap casting 1001 is a solidified body formed by the molten casting in the gap between the combined lower mold modules 3. When the casting shrinks, the outer liquid-blocking plate mold gap casting 1001 is compressed by a smaller proportion than the refractory filler in the above embodiment. Therefore, the ratio of the module gap L to the total length of the casting needs to be determined by experiment. The advantage of this embodiment is that the outer liquid-blocking plate 8 in the lower module gap can be fixed to one of the combined lower mold modules 3, and the refractory filler in embodiment 1 is not required. The refractory filler 7 in the lower module gap needs to be repositioned for each casting produced.

[0060] Example 4

[0061] The difference from Example 3 is that the inner liquid-blocking plate 9 in the gap between the lower modules replaces the outer liquid-blocking plate 8 in the gap between the lower modules, such as... Figure 17As shown, the shape is also U-shaped. The two sides and bottom surface of the liquid blocking plate 9 in the gap between the lower modules are in contact with the casting groove 303 of the combined lower mold module 3. The three sides of the U-shape of the liquid blocking plate 9 in the gap between the lower modules are attached to the inner side 3031, the outer side 3032, and the bottom side 3033 of the casting groove, respectively. When the casting liquid is poured in, it prevents the casting liquid from leaking out from the gap between the combined lower mold modules 3. When the casting shrinks, there will be no casting body 1001 in the gap between the mold as in Example 3. As long as the gap between the combined lower mold modules 3 is greater than L, which is greater than the shrinkage value, it is acceptable. The disadvantage is that the casting has a gap or is integrated with the liquid blocking plate 9 in the gap between the lower modules. Castings that cannot tolerate this need to be processed along their entire length.

[0062] Example 5

[0063] Compared to the above embodiments, a combined lower mold module 3 upper mold is added for casting such as Figure 23 and Figure 24 The casting with weight-reducing groove shown is Figure 23 The figure shows a hollow frame-type casting 101 with several weight-reducing grooves 102. The casting device structure, excluding the grooves, is the same as in the above embodiment. The structure of the grooves in the figure is composed of… Figure 25 Each weight-reducing groove 102 formed by immersing the core 12 in the molten metal has a corresponding core immersed in the molten metal. The core 12 is fixed on the lifting guide rail 14 by the connecting rod 13. The lifting guide rail 14 moves up and down along the lifting guide rail seat. After the molten metal is poured in, the lifting guide rail 14 descends and drives the core 12 to be immersed in the molten metal to form the weight-reducing groove 102.

[0064] Example 6

[0065] Unlike the rollers and double linear rolling guides in the above embodiments, the rolling guides are replaced by hydrostatic guides, which reduces the moving resistance of the combined lower mold module 3. However, the hydrostatic guide structure in this embodiment is more complex and more expensive, and is only suitable for large molds with a large mold weight.

[0066] Example 7

[0067] Unlike the above embodiments, the positioning device between each lower module before pouring is used Figure 26 and Figure 27 The positioning plate shown is replaced by positioning strip 15. Figure 21 The positioning plate shown has a positioning pin, and the positioning strip 15 is installed below the positioning plate 10, corresponding to the gap between each combined lower mold module 3. Figure 28 The positioning plate 10 and positioning strip 15 are combined, and each combination of lower mold modules 3 is combined. The positioning strip 15 is embedded in the gap of each lower module. After the casting is completed, the positioning plate 10 and positioning strip 15 are removed, and each combination of lower mold modules 3 can move as the molten metal solidifies and shrinks.

[0068] Example 8

[0069] like Figure 29 As shown, the casting of part 16, whose upper and lower surfaces are not parallel, is as follows: Figure 16 The heat shrinkage plane of the casting shown can be plane AB, plane CD, or any plane on line AC that passes through O. This embodiment selects plane CD, which differs from the previous embodiments as follows: Figure 30 As shown, the inclined base 17 replaces the base 4 in the above embodiments, so that... Figure 29 The upper plane of the non-parallel casting 16 shown is on a horizontal plane. At the same time, an inclined base module backing 18 is provided at one end of the lower side of the inclined base 17 to prevent the combined lower mold module 3 from sliding down, so that the entire lower mold assembly is positioned.

[0070] The beneficial effects of this invention are as follows: a lower mold is formed by assembling several lower modules, with gaps between each lower module. Each lower module has a casting groove, and the casting grooves on each lower module are combined to form a complete casting groove for the lower mold. There are liquid-blocking devices between the modules to prevent the molten casting from leaking out of the casting groove. Each module has rolling or hydrostatic support underneath to ensure smooth movement of each lower module. The inner sides of each casting groove together form the shape of a compressible core. Reusable hard materials can be used as the lower mold and core, which improves production efficiency, eliminates the pollution caused by using sand cores, and effectively reduces casting costs.

[0071] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A core-containing lower mold for hollow frame-type metal casting, characterized in that a heat-shrinkable plane is provided in the length and width directions of the casting: It consists of two or more lower modules. Each lower module has a casting groove. The casting grooves on the lower modules are assembled to form a complete lower mold casting groove. There are gaps between the lower modules. There are liquid-blocking devices in the gaps to prevent the casting liquid from leaking out of the gaps. Each lower module is mounted on a rolling or hydrostatic support guide rail. Each lower module can move in a direction parallel to the heat shrink plane. There are removable mutual positioning devices between the lower molds.

2. The core-containing lower mold for hollow frame metal casting according to claim 1, characterized in that: The gaps between the lower modules are filled with fireproof cotton.

3. The core-containing lower mold for hollow frame metal casting according to claim 1 or 2, characterized in that: The fireproof filling is made of aluminum silicate cotton or porous silica insulation cotton.

4. The core-containing lower mold for hollow frame metal casting according to claim 1, characterized in that: Each lower module has a U-shaped external liquid-blocking plate between it, which is respectively locked on the sides and bottom of the two adjacent lower modules.

5. The core-containing lower mold for hollow frame metal casting according to claim 1, characterized in that: The gaps between each lower module are secured by U-shaped internal liquid-blocking plates, which are respectively clamped on the inner and outer sides and bottom edge of the casting groove of the two adjacent lower modules.

6. The core-containing lower mold for hollow frame metal casting according to claim 1, characterized in that: Each lower die and base is provided with a rolling plane, and there is a rolling element between the two rolling planes.

7. The core-containing lower mold for hollow frame metal casting according to claim 1, characterized in that: Each lower module is equipped with a cross-shaped combination rolling guide or a hydrostatic guide.

8. The core-containing lower mold for hollow frame metal casting according to claim 1, characterized in that: It consists of a positioning plate and positioning pins, with positioning pin holes on each lower module.

9. The core-containing lower mold for hollow frame metal casting according to claim 1, characterized in that: It consists of a positioning plate and a positioning strip, with the positioning strip embedded in the gaps between each lower module.

10. The core-containing lower mold for hollow frame metal casting according to claim 1, characterized in that: When the heat-shrinkable plane is not parallel to the horizontal plane, the lower module at the lower end is positioned by a lateral positioning block.

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