Opening and closing casting mold structure

Abstract

The utility model discloses an opening and closing casting mold structure. The opening and closing casting mold of the present invention is arranged up and down. Matching surfaces are respectively arranged outside the mold cavity and an outer riser and a fence are arranged on the outer side of the matching surface of the lower mold. After the upper and lower molds are separated, molten metal is poured into the lower mold and then the mold is closed. Before the mold is closed, the molten metal immerses the matching surface. At the same time, the riser in the upper mold can be configured to fully exhaust the gas in the casting mold. Because no runner is required, the flow distance of the molten metal is short, and defects such as cold shut and undercasting will not occur. When a vibration table is used for vibration, slag inclusions are discharged through the gap between the two mold surfaces before the mold is closed and between the inner risers. Before the mold is closed, part of the molten metal between the parting surfaces of the upper and lower molds is solidified and not discharged. The solidified metal body is thin and is very easy to clean and cut. The utility model can be used in gravity casting, pressure casting, extrusion casting and other opening and closing mold occasions.

Description

Technical Field

[0001] The utility model relates to the field of casting moulds, in particular to an opening and closing casting mould structure. Background Art

[0002] Many casting models for metal casting use open and close molds, such as ceramic molds, metal molds, and die-casting molds, extrusion casting molds, etc. The characteristics of this type of mold are that a number of exhaust grooves are set on the parting surface and a pouring channel is set in the mold. After the mold is closed, pouring is performed. The problem is that the exhaust is not complete during the pouring process to form air holes in the casting. In more complex castings or larger castings, the passage of molten metal in the pouring channel and the cavity is restricted by the fluidity of the molten metal, which will cause defects such as cold shut and incomplete filling. The current solution is to use mold flow analysis to improve the pouring channel and even improve the shape of the workpiece, but it is difficult to adjust for large and complex castings. Utility Model Content

[0003] In order to solve the above problems, the utility model provides an opening and closing casting mold structure, which can effectively solve the deficiencies in the prior art.

[0004] The utility model is realized through the following technical scheme: an opening and closing casting mold structure, an upper and lower mold configuration of the casting mold, the upper and lower molds respectively have matching surfaces at the parting surface, the matching surfaces are arranged on the outer sides of the upper and lower model cavities, a fence higher than the parting matching surface is provided on the outer side of the matching surface of the lower mold, and a gap is provided between the inner side of the fence and the outer side of the upper mold. When the upper and lower molds are separated, the molten metal is poured into the lower mold cavity, and then the upper and lower molds are closed. Before closing the mold, the matching surfaces of the upper and lower molds are immersed in the molten metal, and the air in the lower mold cavity can be discharged through the gap between the matching surfaces to the outer side of the upper mold and the inner side of the fence, and discharged. At the same time, the unsolidified molten metal between the two matching surfaces is discharged, and a layer of solidified metal is left between the matching surfaces. The molten metal between the peripheral enclosure of the lower mold and the outer side of the upper mold forms an external riser. The upper and lower model cavities are workpieces, and there is a layer of metal solidified when the upper and lower molds are closed between the matching surfaces.

[0005] As a preferred technical solution, the upper and lower mold matching surfaces have at least one notch as an external riser shrinkage feeding channel.

[0006] As a preferred technical solution, a riser hole is provided on the upper die.

[0007] As an optimal technical solution, the lower mold is placed on a vibration platform, and the vibration platform drives the lower mold and the molten metal in the lower mold to vibrate to discharge the gas, and the slag floats up and is discharged to the outer riser through the gap on the mating surfaces before the upper and lower molds are closed, or is discharged to the inner riser through the inner riser hole.

[0008] The utility model is realized by the following technical scheme: the upper and lower molds of the casting mold are configured, the upper and lower molds have matching surfaces at the parting surface respectively, the matching surfaces are arranged on the outer sides of the upper and lower model cavities, the outer side of the matching surface of the lower mold has a fence higher than the matching surface of the parting surface, and there is a gap between the inner side of the fence and the outer side of the upper mold, when the upper and lower molds are separated, the metal liquid is poured into the lower mold cavity, and then the upper and lower molds are molded together, the matching surfaces of the upper and lower molds are immersed in the metal liquid before the mold is closed, and at the same time, the unsolidified metal liquid between the two matching surfaces is discharged during the mold closing, and a layer of solidified metal is left between the fitting surfaces, and the metal liquid between the surrounding baffle of the lower mold and the outer side of the upper mold forms an external riser, and there is a riser hole on the upper mold, and the air in the upper and lower mold cavities is discharged through the riser hole of the upper mold, and after the upper and lower molds are closed, there is a locking mechanism to lock the upper and lower molds and insert an extrusion piston into the riser hole of the upper mold to squeeze downward. The metal liquid in the riser hole on the upper mold forms an internal riser, the upper and lower model cavities are workpieces, and there is a layer of metal solidified when the upper and lower molds are closed between the matching surfaces of the upper and lower molds.

[0009] As a preferred technical solution: the lower mold is placed on a vibration platform, and the vibration platform drives the lower mold and the molten metal in the lower mold to vibrate to discharge the gas, and the slag floats up and is discharged to the outer riser through the gap on the matching surfaces before the upper and lower molds are closed, or is discharged to the inner riser through the inner riser hole.

[0010] The beneficial effects of the utility model are as follows: the utility model adopts an upper and lower arrangement of the opening and closing casting mold, matching surfaces are respectively arranged outside the cavity and an outer riser and a fence are arranged on the outer side of the matching surface of the lower mold, after the upper and lower molds are separated, the molten metal is poured into the lower mold and then the molds are closed, the molten metal immerses the matching surfaces before the molds are closed, and the riser in the upper mold can be arranged at the same time, so that the gas in the casting mold is fully exhausted, and because no runner is required, the flow distance of the molten metal is short, and defects such as cold shut and undercasting will not occur, when the vibration table is used for vibration, the slag is discharged through the gap between the two mold surfaces before the mold is closed and between the inner risers, and part of the molten metal between the upper and lower mold parting surfaces before the mold is closed is solidified and not discharged, the solidified metal body is thin, and it is very easy to clean and cut, and it can be used in gravity casting, pressure casting, extrusion casting and other opening and closing mold occasions. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] 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 of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 This is a schematic diagram of the utility model wherein the upper and lower molds are separately injected with molten metal;

[0013] Figure 2 This is a schematic diagram of the upper and lower molds of the utility model;

[0014] Figure 3 This is a schematic diagram of the upper and lower molds of the utility model being completed;

[0015] Figure 4 It is a schematic diagram of the upper and lower casting molds (the upper mold has a riser) of the utility model for separately injecting molten metal;

[0016] Figure 5 It is a schematic diagram of the upper and lower casting molds (the upper mold has a riser) of the utility model in the mold closing;

[0017] Figure 6 This is a schematic diagram of the upper and lower casting molds (the upper mold has a riser) of the utility model after the mold is closed;

[0018] Figure 7 The upper and lower molds (upper mold with riser) of the utility model are clamped;

[0019] Figure 8 It is the pressure compensation of the upper and lower casting molds (the upper mold has a riser) of the utility model;

[0020] Fig. 9 This is a schematic diagram of the aluminum wheel hub of the utility model having upper and lower casting molds that are separately injected with aluminum liquid;

[0021] Fig.10 The upper and lower casting molds of the aluminum wheel hub of the utility model are in the mold;

[0022] Fig.11 The upper and lower casting molds of the aluminum wheel hub of the utility model are completed;

[0023] Fig.12 It is used to lock the upper and lower casting molds of the aluminum wheel hub of the utility model;

[0024] Fig.13 It is the pressure compensation of the upper and lower casting molds of the aluminum wheel hub of the utility model;

[0025] Fig.14 It is a comparative technical illustration diagram of the utility model;

[0026] Fig.15 This is a schematic diagram of the upper and lower alignment of the injection cylinder of the comparative technology of the utility model;

[0027] Fig.16 This is a schematic diagram of the first extrusion of the injection head rising in the comparative technology of the utility model;

[0028] Fig.17 The upper punch squeezes downward for the second supplementary pressure in the comparative technology of the utility model;

[0029] Fig.18 Punching with a punch as a comparative technique of the utility model;

[0030] Fig.19 This is a schematic diagram of a vibration table of the utility model;

[0031] Fig. 20 It is a schematic diagram of a workpiece of the utility model;

[0032] Fig.21 It is a schematic diagram of a finished blank of the utility model;

[0033] Description of reference numerals:

[0034] 1. Upper die; 101. Upper die with internal riser; 102. Upper die mating surface; 103. Upper die side; 104. Upper die feeding channel; 105. Internal riser hole; 2. Lower die; 201. Lower die metal liquid fence; 202. Lower die mating surface; 3. Metal liquid; 4. Casting; 5. External riser; 6. Feeding channel solidified body; 7. Mating surface metal sheet; 8. Internal riser; 9. Shot rod; 10. Lower die plate of aluminum wheel hub; 11. Slider; 111. Slider mating surface; 12. Upper die of aluminum wheel hub; 121. Upper die mating surface of aluminum wheel hub; 13. Upper die of original technology; 14. Upper punch; 15. Slider; 16. Lower die; 17. Shot head; 18. Cylinder; 19. Vibrating table; DETAILED DESCRIPTION

[0035] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0036] Any feature disclosed in this specification (including any additional claims, abstract and drawings), unless otherwise stated, may be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0037] Example 1

[0038] like Figure 1-Figure 3 As shown, there are an upper mold 1 and a lower mold 2, and the upper and lower molds have a parting surface upper mold mating surface 102 and a lower mold mating surface 202 respectively. The lower mold 2 is surrounded by a metal fence 201 that is higher than the parting surface to surround the metal liquid of the lower mold, as shown in FIG. Figure 1 As shown, the upper and lower molds are separated, and the molten metal 3 is poured into the lower mold 2. Figure 2 It is the state of the upper and lower molds being clamped. Figure 3It is the state after the upper and lower mold parting surfaces are fitted. During the mold closing process, the two mold surfaces are constantly approaching, and the molten metal 3 immerses the two mold surfaces. There is a gap between the upper mold side 103 and the lower mold molten metal fence 201. The air is discharged through the gap, and the excess molten metal 3 is also discharged in the gap to form an external riser 5. There is an upper mold shrinkage feeding channel 104 on the upper mold 1. The molten metal 3 in the external riser 5 feeds the cast workpiece casting 4 through the upper mold shrinkage feeding channel 104, and forms the workpiece casting 4 after solidification. The shrinkage channel solidified body 6 formed by the external riser 5 and the upper mold shrinkage feeding channel 104, and the metal solidified between the two fitting surfaces before the mold closing cannot be discharged, thereby forming a thin transition layer of mold surface metal sheet 7.

[0039] Example 2

[0040] The difference from Example 1 is that Figure 4 As shown, an internal riser hole 105 is provided on the upper mold 101 with an internal riser as the internal riser, the upper mold shrinkage feeding channel 104 can be cancelled, and there is no gap in the mating surface of the upper and lower molds. After the casting 4 solidifies, there are the casting 4 and the external riser 5, and the casting 4 and the external riser 5 are connected by a mating surface metal sheet 7, and the internal riser 8 is connected to the casting 4.

[0041] Example 3

[0042] The difference from the second embodiment is that the upper mold 1 eliminates the upper mold shrinkage feeding channel 104 and leaves the inner riser hole 105 as the shrinkage feeding riser. At the same time, after the mold is closed in the embodiment, a clamping device applies a clamping force to the upper and lower molds. Figure 7 As shown in the figure, P lock is the clamping force. After the clamping is completed, the injection rod 9 is squeezed downward through the inner riser hole 105 (as shown in FIG. Figure 8 As shown), there may be multiple groups of inner riser holes 105 and injection rods 9.

[0043] Example 4

[0044] Different from the above embodiments, Figure 9-13 As shown, the aluminum wheel hub manufacturing process is that two sliders 11 are respectively installed on the aluminum wheel hub lower mold plate 10, and can be separated and combined left and right, and there is an aluminum wheel hub upper mold 12. Fig. 9 The state is that the upper and lower molds are separated and the aluminum liquid is poured in. Fig.10 During the mold closing process, the aluminum liquid immerses the mold closing surfaces of the upper and lower molds, the upper mold closing surface 121 of the aluminum wheel hub and the mold closing surface 111 of the slider. Fig.11 The upper and lower molds are completed. Fig.12 To complete the mold locking, Fig.13 The injection rod 9 is downwardly injected to allow the casting 3 to complete solidification and shrinkage compensation under pressure. As a comparative technology of this embodiment, Figure 14-18As shown, the first step is pouring, the second step is to align and rise the injection cylinder, the third step is to move the injection head up and inject aluminum liquid, the fourth step is to push the upper punch down, and the fifth step is to punch holes. The exhaust mold of the comparative technology is the exhaust groove at the fitting surface of the slider of the upper mold 13 and 15 of the original technology. Generally, the depth of the exhaust groove is between 0.1-0.2mm, and the width of the exhaust groove is between 5-25mm, which is very different from the open exhaust of this embodiment.

[0045] Example 5

[0046] The difference from the above embodiment is that Fig.19 As shown, a vibration table 19 is installed under the lower mold 2, which can vibrate the residue in the molten metal 3 to the surface of the molten metal 3 and discharge it through the open exhaust port, which can effectively avoid the slag inclusion in the rotation 4.

[0047] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that are not conceived through creative work should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope defined in the claims.

Claims

1. An opening and closing casting mold structure, characterized in that: The casting mold is configured with upper and lower molds, and the upper and lower molds have matching surfaces at the parting surface respectively. The matching surfaces are arranged on the outside of the upper and lower model cavities. There is a fence higher than the parting matching surface on the outside of the lower mold matching surface, and there is a gap between the inner side of the fence and the outer side of the upper mold. When the upper and lower molds are separated, the molten metal is poured into the lower mold cavity, and then the upper and lower molds are closed. Before closing the mold, the matching surfaces of the upper and lower molds are immersed in the molten metal, and the air in the lower mold cavity can be discharged to the space outside the upper mold and inside the fence through the gap between the matching surfaces, and discharged. At the same time, the unsolidified molten metal between the two matching surfaces is discharged, and a layer of solidified metal is left between the matching surfaces. The molten metal between the surrounding baffle of the lower mold and the outer side of the upper mold forms an external riser. The upper and lower model cavities contain workpieces, and there is a layer of metal solidified when the upper and lower molds are closed between the matching surfaces.

2. The opening and closing casting mold structure according to claim 1, characterized in that: The mating surfaces of the upper and lower dies have at least one notch as a shrinkage-filling channel for the external riser.

3. The opening and closing casting mold structure according to claim 1, characterized in that: The upper die is provided with a riser hole.

4. The opening and closing casting mold structure according to claim 1, 2 or 3, characterized in that: The lower die is placed on a vibration platform, which drives the lower die and the molten metal in the lower die to vibrate to discharge the gas, and the slag floats up and is discharged to the outer riser through the gap between the matching surfaces before the upper and lower dies are closed, or discharged to the inner riser through the inner riser hole.

5. An opening and closing casting mold structure, characterized in that: The casting mold is configured with upper and lower molds, and the upper and lower molds have matching surfaces at the parting surface respectively. The matching surfaces are arranged on the outsides of the upper and lower model cavities. There is a fence higher than the parting matching surface on the outside of the lower mold matching surface, and there is a gap between the inner side of the fence and the outer side of the upper mold. When the upper and lower molds are separated, the molten metal is poured into the lower mold cavity, and then the upper and lower molds are closed. Before closing the mold, the matching surfaces of the upper and lower molds are immersed in the molten metal. At the same time, the unsolidified molten metal between the two matching surfaces is discharged when closing the mold, and a layer of solidified metal is left between the fitting surfaces. The molten metal between the surrounding baffle of the lower mold and the outer side of the upper mold forms an external riser, and there is a riser hole on the upper mold. The air in the upper and lower mold cavities is discharged through the riser hole of the upper mold. After the upper and lower molds are closed, a locking mechanism locks the upper and lower molds and inserts an extrusion piston into the riser hole of the upper mold to extrude downward. The molten metal in the riser hole on the upper mold forms an internal riser. There are workpieces in the upper and lower model cavities, and there is a layer of metal solidified when the upper and lower molds are closed between the matching surfaces of the upper and lower molds.

6. The opening and closing casting mold structure according to claim 5, characterized in that: The lower die is placed on a vibration platform, which drives the lower die and the molten metal in the lower die to vibrate to discharge the gas, and the slag floats up and is discharged to the outer riser through the gap between the matching surfaces before the upper and lower dies are closed, or discharged to the inner riser through the inner riser hole.

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