Structure for opening and closing casting mold and pouring method

Abstract

According to the opening and closing casting mold structure and the pouring method, the opening and closing casting mold is arranged up and down, matching faces are arranged outside a mold cavity, an outer riser and a fence are arranged on the outer side of the matching face of a lower mold, after the upper mold and the lower mold are separated, molten metal is poured to the lower mold, then mold closing is conducted, the matching faces are immersed in the molten metal before mold closing, and meanwhile an upper mold inner riser can be arranged; due to the fact that a pouring gate is not needed, the flowing distance of molten metal is short, and the defects of cold shut, insufficient casting and the like cannot be generated, when a vibration table is used for vibration, included slag is discharged through a gap between two mold closing faces before mold closing and an inner riser, part of the molten metal between the upper mold parting face and the lower mold parting face before mold closing is solidified and is not discharged, and a metal solidification body is thin. Cleaning and cutting are very easy, and the mold opening and closing device can be used in mold opening and closing occasions such as gravity casting, pressure casting and extrusion casting.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of casting mold, in particular to a structure of open-close casting mold and a pouring method. BACKGROUND

[0002] Many casting models of metal casting adopt open-close mold, such as ceramic mold, metal mold and die casting mold extrusion casting mold, and the characteristics of such casting molds are that a plurality of exhaust grooves are arranged on the parting surface and a pouring channel is arranged in the casting mold, and the problems are that the exhaust is not complete during pouring to form pores in the casting, and the metal liquid is limited by the flowability in the pouring channel and the cavity, and defects such as cold shut and incomplete filling are caused, and the current solution is to use mold flow analysis to improve the pouring channel, and even to improve the shape of the workpiece, but it is difficult to adjust for large and complex castings. SUMMARY

[0003] In order to solve the above problems, the present application provides a structure of open-close casting mold and a pouring method, which can effectively solve the defects in the prior art.

[0004] The present application is realized by the following technical scheme: a structure of open-close casting mold and a pouring method, the upper and lower molds are arranged on the casting mold, the upper and lower molds have matching surfaces at the parting surface, the matching surfaces are arranged outside the cavities of the upper and lower molds, the outside of the matching surface of the lower mold is provided with a fence higher than the parting matching surface, there is a gap between the inside of the fence and the outside of the upper mold, when the upper and lower molds are separated, the metal liquid is poured into the cavity of the lower mold, then the upper and lower molds are closed, the matching surfaces of the upper and lower molds are submerged in the metal liquid before closing, the air in the cavity of the lower mold can be discharged to the space outside the upper mold and inside the fence through the gap between the matching surfaces, at the same time, the un-solidified metal liquid between the two matching surfaces is discharged, and a layer of solidified metal is left between the matching surfaces, the metal liquid between the periphery of the fence of the lower mold and the outside of the upper mold forms an external sprue, the cavities of the upper and lower molds are for 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.

[0005] As a preferred technical scheme, at least one notch is arranged on the matching surface of the upper and lower molds as an external sprue feeding channel.

[0006] As a preferred technical scheme, a sprue hole is arranged on the upper mold.

[0007] As a preferred technical scheme, the lower mold is placed on a vibrating platform, the vibrating platform drives the lower mold and the metal liquid in the lower mold to vibrate to discharge the gas, the slag floats up and is discharged to the external sprue through the gap between the matching surfaces before the upper and lower molds are closed or is discharged to the internal sprue through the internal sprue hole.

[0008] The present application is realized by the following technical scheme: the upper and lower molds are arranged, the upper and lower molds have matching surfaces at the parting surface, the matching surfaces are arranged outside the upper and lower mold cavities, the lower mold matching surface outside has a fence higher than the parting matching surface, there is a gap between the fence inside and the upper mold outside, when the upper and lower molds are separated, the metal liquid is poured into the lower mold cavity, then the upper and lower molds are closed, before the upper and lower mold matching surfaces are closed, they are all submerged by the metal liquid, at the same time, the un-solidified metal liquid between the two matching surfaces is discharged when the molds are closed, a layer of solidified metal is left between the matching surfaces, the metal liquid between the lower mold periphery fence and the upper mold outside forms an outer sprue, the upper mold has a sprue hole, the air in the upper and lower mold cavities is discharged through the upper mold sprue hole, after the upper and lower molds are closed, a locking mechanism locks the two molds and inserts a pressing piston into the upper mold sprue hole to press downward. The metal liquid in the upper mold sprue hole forms an inner sprue, the upper and lower mold cavities are workpieces, and there is a layer of metal solidified when the upper and lower molds are closed between the upper and lower mold matching surfaces.

[0009] As a preferred technical scheme: the lower mold is placed on a vibrating platform, the vibrating platform drives the lower mold and the metal liquid in the lower mold to vibrate to make the gas be discharged, the slag be floated and be discharged to the outer sprue through the gap between the matching surfaces before the upper and lower molds are closed or be discharged to the inner sprue through the inner sprue hole.

[0010] The present application has the following beneficial effects: the present application adopts the upper and lower arrangement of the opening and closing molds, the matching surfaces are arranged outside the mold cavities respectively and the lower mold matching surface outside is provided with an outer sprue and a fence, after the upper and lower molds are separated, the metal liquid is poured into the lower mold and then the molds are closed, before the molds are closed, the metal liquid submerges the matching surfaces, at the same time, the inner sprue of the upper mold can be arranged, the gas in the mold is fully discharged, and because there is no pouring gate, the flowing distance of the metal liquid is short, the defects such as cold shut and underfilling will not be caused, when the vibrating table is used to vibrate, the slag is discharged through the gap between the two matching surfaces before the molds are closed and the inner sprue, part of the metal liquid between the upper and lower mold parting surfaces is solidified before the molds are closed and is not discharged, the metal solidified body is thin, the cleaning and cutting are very easy, and the present application can be used in the opening and closing mold occasions of the gravity casting, the pressure casting and the extrusion casting. BRIEF DESCRIPTION OF DRAWINGS

[0011] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0012] Figure 1 It is a schematic view of the separate injection of the metal liquid into the upper and lower molds of the present application;

[0013] Figure 2 It is a schematic view of the closing of the upper and lower molds of the present application;

[0014] Figure 3Schematic diagram for the upper and lower mold clamping of the present application;

[0015] Figure 4 Schematic diagram for the separate injection of molten metal into the upper and lower casting molds (the upper mold with a riser) of the present application;

[0016] Figure 5 Schematic diagram for the mold clamping of the present application;

[0017] Figure 6 Schematic diagram for the mold clamping completion of the present application;

[0018] Figure 7 Schematic diagram for the mold clamping of the present application;

[0019] Figure 8 Schematic diagram for the mold clamping of the present application;

[0020] Figure 9 Schematic diagram for the separate injection of molten aluminum into the upper and lower casting molds of the present application;

[0021] Figure 10 Schematic diagram for the mold clamping of the present application;

[0022] Figure 11 Schematic diagram for the mold clamping completion of the present application;

[0023] Figure 12 Schematic diagram for the mold clamping of the present application;

[0024] Figure 13 Schematic diagram for the mold clamping of the present application;

[0025] Figure 14 Schematic diagram for the comparative technology of the present application;

[0026] Figure 15 Schematic diagram for the comparative technology of the present application;

[0027] Figure 16 Schematic diagram for the comparative technology of the present application;

[0028] Figure 17 Schematic diagram for the comparative technology of the present application;

[0029] Figure 18 Schematic diagram for the comparative technology of the present application;

[0030] Figure 19 Schematic diagram for the comparative technology of the present application;

[0031] Figure 20 Schematic diagram for the comparative technology of the present application;

[0032] Figure 21 This is a schematic diagram of the finished blank of the present invention; Attached image description:

[0034] 1. Upper mold; 101. Upper mold with internal riser; 102. Upper mold parting surface; 103. Upper mold side; 104. Upper mold shrinkage channel; 105. Internal riser hole; 2. Lower mold; 201. Lower mold molten metal enclosure; 202. Lower mold parting surface; 3. Molten metal; 4. Casting; 5. External riser; 6. Solidified shrinkage channel; 7. Metal sheet on parting surface; 8. Internal riser; 9. Injection rod; 10. Lower mold plate of aluminum hub; 11. Slider; 111. Slider parting surface; 12. Upper mold of aluminum hub; 121. Upper mold parting surface of aluminum hub; 13. Existing technology upper mold; 14. Upper punch; 15. Slider; 16. Lower mold; 17. Injection head; 18. Barrel; 19. Vibration table; Detailed Implementation

[0035] 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.

[0036] 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.

[0037] Example 1

[0038] like Figures 1-3 As shown, there is an upper mold 1 and a lower mold 2. The upper and lower molds respectively have a parting surface 102 and a lower mold parting surface 202. The lower mold 2 has a metal molten metal enclosure 201 that extends above the parting surface to block the molten metal. Figure 1 As shown, the upper and lower molds are separated, and molten metal 3 is poured into the lower mold 2. Figure 2 This refers to the state during the mold closing process. Figure 3 This is the state after the upper and lower mold parting surfaces are fitted together. During the mold closing process, the two mold surfaces continuously approach each other, and the molten metal 3 is immersed in the two mold surfaces. There is a gap between the side 103 of the upper mold and the molten metal enclosure 201 of the lower mold. Air is discharged through this gap, and excess molten metal 3 is also discharged in this gap to form an external riser 5. The upper mold 1 has an upper mold feeding channel 104. The molten metal 3 in the external riser 5 feeds the casting workpiece 4 through the upper mold feeding channel 104. After solidification, the casting workpiece 4 is formed. The feeding channel solidified solid 6 formed by the external riser 5 and the upper mold feeding channel 104, as well as the metal solidified between the two mating surfaces before mold closing, cannot be discharged, thus forming a thin transition layer of the mold surface metal sheet 7.

[0039] Example 2

[0040] Different from Example 1, as shown in Figure 4 , the upper mold 101 has an inner riser hole 105 as an inner riser, the upper mold feeding channel 104 can be cancelled, the mold closing surface of the upper and lower molds has no gap, the casting 4 is connected with the outer riser 5 after solidification, and the casting 4 and the outer riser 5 are connected by the mold closing surface metal sheet 7, and the inner riser 8 is connected with the casting 4.

[0041] Example 3

[0042] Different from Example 2, the upper mold 1 cancels the upper mold feeding channel 104 and leaves the inner riser hole 105 as a feeding riser, and after the mold closing of the example is completed, a mold locking device is used to apply a mold locking force to the upper and lower molds, as shown in Figure 7 , P-lock in the figure is the mold locking force, after the mold locking is completed, the injection rod 9 is pressed downward through the inner riser hole 105, as shown in Figure 8 , and the inner riser hole 105 and the injection rod 9 can have multiple groups.

[0043] Example 4

[0044] Different from the above examples, as shown in Figures 9-13 , the aluminum hub manufacturing process is that two sliders 11 are respectively installed on the aluminum hub lower mold plate 10 and can be left and right split and closed, and the aluminum hub upper mold 12, Figure 9 is in a state of separation of the upper and lower molds and pouring of the aluminum liquid, Figure 10 is in a state of the upper and lower molds being closed, and the aluminum liquid is immersed in the aluminum hub upper mold closing surface 121 and the slider closing surface 111 of the upper and lower mold closing surfaces before the mold closing, Figure 11 is in a state of the upper and lower molds being closed, Figure 12 is in a state of the mold locking being completed, Figure 13 the injection rod 9 is pressed downward to make the casting 3 complete solidification feeding under pressure, and as a comparison technology of the present example, as shown in Figures 14-18 , they are respectively the first step of pouring, the second step of the injection cylinder being adjusted and rising, the third step of the injection head being moved upward and injecting the aluminum liquid, the fourth step of the upper punch being pressed downward, and the fifth step of the upper punch punching, the exhaust groove of the comparison technology is the exhaust groove at the joint surface of the original technology upper mold 13 and 15 sliders, and the depth of the exhaust groove is generally 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 the present example.

[0045] Example 5

[0046] Different from the above examples, as shown in Figure 19 , a vibration table 19 is installed under the lower mold 2, which can vibrate the residues in the metal liquid 3 to the surface of the metal liquid 3 and discharge them through the open exhaust port, which can effectively avoid the inclusion of the rotating body 4.

[0047] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited thereto, any change or replacement without creative labor should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be limited by the protection scope defined in the claims.

Claims

1. A structure and casting method for an openable casting mold, characterized in that: The casting mold is configured with upper and lower molds, each with a mating surface at the parting line. The mating surfaces are located on the outer sides of the upper and lower mold cavities. The outer side of the lower mold mating surface has a barrier higher than the parting mating surface. There is a gap between the inner side of the barrier and the outer side of the upper mold. When the upper and lower molds separate, molten metal is poured into the lower mold cavity. Then the upper and lower molds are closed. Before the molds are closed, the mating surfaces of the upper and lower molds are both submerged in molten metal. Air in the lower mold cavity can be discharged through the gap between the mating surfaces to the outer side of the upper mold and the inner side of the barrier. At the same time, the unsolidified molten metal between the two mating surfaces is discharged, leaving a layer of solidified metal between the mating surfaces. The molten metal between the lower mold perimeter barrier and the outer side of the upper mold forms an external riser. The upper and lower mold cavities contain the workpiece, and there is a layer of metal that solidified when the upper and lower molds are closed between the mating surfaces.

2. The structure and casting method of the opening and closing casting mold according to claim 1, characterized in that: There should be at least one notch on the mating surfaces of the upper and lower molds to serve as a feeding channel for the external riser.

3. The structure and casting method of the opening and closing casting mold according to claim 1, characterized in that: The upper mold is equipped with riser holes.

4. The structure and casting method of the opening and closing casting mold according to claim 1, 2, or 3, characterized in that: The lower mold is placed on a vibrating platform. The vibrating platform drives the lower mold and the molten metal inside the lower mold to vibrate, causing the gas to be discharged. The slag floats up and is discharged to the outer riser or to the inner riser through the gap between the mating surfaces of the upper and lower molds before they are closed.

5. A structure and casting method for an openable casting mold, characterized in that: The casting mold consists of upper and lower molds, each with a mating surface at the parting line. These mating surfaces are located on the outer sides of the upper and lower mold cavities. The lower mold's mating surface has a barrier higher than the parting surface, and there is a gap between the inner side of the barrier and the outer side of the upper mold. When the upper and lower molds separate, molten metal is poured into the lower mold cavity. Then, the upper and lower molds close. Before closing, both the mating surfaces of the upper and lower molds are submerged in molten metal. Simultaneously, the undried molten metal between the two mating surfaces is expelled during mold closing, leaving a layer of solidified metal between the mating surfaces. The molten metal between the lower mold's perimeter barrier and the outer side of the upper mold forms an external riser. The upper mold has riser holes through which air in the upper and lower mold cavities is expelled. After the upper and lower molds close, a locking mechanism locks them together, and a pressing piston is inserted into the riser hole of the upper mold to press downwards. The molten metal in the riser hole of the upper mold forms an internal riser. The workpiece is inside the upper and lower mold cavities, and there is a layer of metal that solidified during mold closing between the mating surfaces of the upper and lower molds.

6. The structure and casting method of the opening and closing casting mold according to claim 5, characterized in that: The lower mold is placed on a vibrating platform. The vibrating platform drives the lower mold and the molten metal inside the lower mold to vibrate, causing the gas to be discharged. The slag floats up and is discharged to the outer riser or to the inner riser through the gap between the mating surfaces of the upper and lower molds before they are closed.

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