A core structure

Abstract

This utility model discloses a mold core structure, belonging to the field of molds, including a matching fixed mold core and a moving mold core. After mold closing, the cavity is located between the fixed mold core and the moving mold core. The cavity of the fixed mold core protrudes on the side facing the moving mold core, while the cavity of the moving mold core is recessed at the far end facing the fixed mold core. The cavity is located on the moving mold core. The starting end of the cavity filling is connected to the sprue sleeve through a horizontal sprue, and the ending end of the cavity filling is connected to the slag pot through a main overflow channel. The rear end of the slag pot is connected to the venting groove through a secondary overflow channel. The sprue sleeve and the slag pot are arranged opposite each other. The purpose of this utility model is to provide a mold core structure that can improve the quality of castings.

Description

Technical Field

[0001] This utility model relates to the field of molds, specifically a mold core structure. Background Technology

[0002] like Figures 1-2 The casting shown is a shell structure with a complex curved surface. Due to functional requirements, the surface roughness of the inner wall of the casting is required to be as smooth as possible. If the conventional method of a recessed fixed mold core and a raised moving mold core is used, the ejector pins, inserts, and angled ejectors on the moving mold core will often leave marks on the moving mold side of the casting, affecting the casting quality. At the same time, because the casting has a complex curved surface, it is difficult for air in the cavity to escape when the molten metal is injected into the cavity, which may further reduce the quality of the casting. Utility Model Content

[0003] The purpose of this invention is to address the above problems by providing a mold core structure that can improve the quality of castings.

[0004] To achieve the above objectives, the technical solution adopted in this application is: a mold core structure, including a fixed mold core and a moving mold core, wherein after mold closing, the cavity is located between the fixed mold core and the moving mold core; the cavity of the fixed mold core protrudes on the side facing the moving mold core, and the cavity of the moving mold core is recessed at the far end facing the fixed mold core; the cavity is located on the moving mold core; the starting end of the cavity filling is connected to the sprue sleeve through a horizontal sprue; the ending end of the cavity filling is connected to the slag bag through a main overflow channel; and the rear end of the slag bag is connected to the venting groove through a secondary overflow channel; the sprue sleeve and the slag bag are arranged opposite to each other. The inner wall of the casting is located on the fixed mold core side, and the fixed mold core has no ejector pins or angled ejectors, thus ensuring that there are no ejector pin or angled ejector pin marks on the inner wall of the casting. This avoids ejector pin marks on the inner wall of the casting caused by ejector pins or angled ejectors not being reset properly during the production process, thereby improving and maintaining the stability of the casting quality. At the same time, optimized venting ensures that the gas flow path in the cavity and the flow path of the molten metal entering the cavity do not interfere with each other during the die casting process, avoiding backflow and air entrapment, and further ensuring the quality of the casting.

[0005] Furthermore, the horizontal runners and overflow channels are spaced apart along the length of the casting. The two outermost horizontal runners have arc-shaped sections, and the arc-shaped sections on both sides are connected to the two sides of the cavity through the gates. The gates on both sides are spaced apart along the line connecting the gate sleeve and the slag pot. By using multiple horizontal runners, the flow distance of a single stream of molten metal to the edge of the cavity is reduced, avoiding the cavity from being unable to be filled due to the decrease in temperature and flow rate at the front end of the molten metal. At the same time, it reduces phenomena such as shrinkage cavities and air entrapment. Combined with the design of pressure and other parameters, it ensures complete fusion of the molten metal and reduces or avoids weld seams.

[0006] Furthermore, the exhaust groove is located between the upper exhaust plate and the lower exhaust plate. The upper and lower exhaust plates are respectively provided with matching grooves and bosses, which are arranged laterally, making the exhaust groove wavy. This facilitates the discharge of gas from the cavity while preventing molten metal from overflowing.

[0007] The beneficial effects of this application are: the inner wall side of the casting is located on the fixed mold core side, and the fixed mold core does not have ejector pins, angled ejectors, etc., thereby ensuring that there are no ejector pins, angled ejectors, etc. marks on the inner wall of the casting, avoiding the appearance of ejector pin marks on the inner wall of the casting due to the ejector pins and angled ejectors not being reset in place during the production process, thus improving and maintaining the stability of the casting quality; at the same time, the venting is optimized, further ensuring the quality of the casting. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the outer surface structure of the casting.

[0009] Figure 2 This is a schematic diagram of the internal surface structure of the casting.

[0010] Figure 3 This is a schematic diagram of the mold closing structure.

[0011] Figure 4 This is a schematic diagram of the fixed mold core structure.

[0012] Figure 5 This is a schematic diagram of the moving mold core structure.

[0013] Figure 6 This is a schematic diagram of the cross-sectional structure of the fixed mold core and the moving mold core in the mold-closed state.

[0014] Figure 7 This is a schematic diagram of the casting structure in the die-cast state.

[0015] The text labels in the figure represent: 1. Casting; 202. Fixed mold core; 210. Upper vent plate; 211. Groove; 302. Moving mold core; 305. Cavity; 308. Lower vent plate; 309. Boss; 324. Main overflow channel; 325. Secondary overflow channel; 4. Sprue sleeve; 5. Horizontal runner; 501. Sprue; 6. Slag bag. Detailed Implementation

[0016] To enable those skilled in the art to better understand the technical solution of this application, the application will be described in detail below with reference to the accompanying drawings. The description in this section is only exemplary and explanatory, and should not be used to limit the scope of protection of this application.

[0017] Example 1, as Figures 3-7As shown, the specific structure of this embodiment is a mold core structure, including a fixed mold core 202 and a moving mold core 302. After the mold is closed, the cavity 305 is located between the fixed mold core 202 and the moving mold core 302. The cavity of the fixed mold core 202 protrudes on the side facing the moving mold core 302, and the cavity of the moving mold core 302 is recessed at the far end facing the fixed mold core 202. The cavity 305 is located on the moving mold core 302. The starting end of the cavity 305 is connected to the sprue sleeve 4 through the horizontal sprue 5, and the ending end of the cavity 305 is connected to the slag bag 6 through the main overflow channel 324. The rear end of the slag bag 6 is connected to the venting groove through the secondary overflow channel 325. The sprue sleeve 4 and the slag bag 6 are arranged opposite to each other. In this embodiment, the horizontal runner 5 and the slag pot 6 are both spaced apart along the length of the casting 1. For this purpose, the sprue sleeve 4 is connected to all the horizontal runners 5 through the sprue nozzle. The sprue sleeve 4 is located in the middle of one side of the fixed mold core 202. The number of main overflow channels 324 matches the slag pot 6.

[0018] Arc-shaped sections are provided on the two horizontal runners 5 located at both ends of the length direction of the casting 1. The arc-shaped sections on both sides are connected to the two sides of the cavity 305 through the gates 501, so that the two gates 501 are located at both ends of the length direction of the casting 1. The gates 501 on both sides are spaced apart along the line connecting the gate sleeve 4 and the slag bag 6.

[0019] The venting groove is located between the upper venting plate 210 and the lower venting plate 308. The upper venting plate 210 and the lower venting plate 308 are respectively provided with matching grooves 211 and bosses 309. When the mold is closed, the bosses 309 extend into the grooves 211, but a gap remains between the inner wall of the groove 211 and the outer wall of the bosses 309 to serve as a venting channel and to store the cold material at the front end. When the mold is closed, the upper venting plate 210 and the lower venting plate 308 fit tightly at the remaining positions. The grooves 211 and the bosses 309 are arranged along the width direction of the casting 1, making the venting groove wavy, with the rear end of the venting groove open. During pouring, the molten metal enters the cavity 305 through the sprue sleeve 4 and each horizontal runner 5. The cold material and gas at the end of the filling are pushed into each slag bag 6, and the gas is discharged outside the mold through the wavy venting groove. When the mold is opened, the casting 1 remains on the moving mold core 302 through the slider on the moving mold core 302.

[0020] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0021] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of this utility model, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without modification, should all be considered within the protection scope of this utility model.

Claims

1. A mold core structure, comprising a fixed mold core (202) and a movable mold core (302), wherein after mold closing, a cavity (305) is located between the fixed mold core (202) and the movable mold core (302), characterized in that, The cavity of the fixed mold core (202) protrudes on the side facing the moving mold core (302), and the cavity of the moving mold core (302) is recessed at the far end facing the fixed mold core (202). The cavity (305) is located on the moving mold core (302). The starting end of the cavity (305) is connected to the sprue sleeve (4) through the horizontal sprue (5). The ending end of the cavity (305) is connected to the slag bag (6) through the main overflow channel (324). The rear end of the slag bag (6) is connected to the venting groove through the secondary overflow channel (325). The sprue sleeve (4) and the slag bag (6) are arranged opposite to each other.

2. The core structure according to claim 1, characterized in that, The horizontal runners (5) and overflow channels are arranged at intervals along the length of the casting (1). The two outermost horizontal runners (5) are provided with arc-shaped sections. The arc-shaped sections on both sides are connected to the two sides of the cavity (305) through the gates (501). The gates (501) on both sides are arranged at intervals along the line connecting the gate sleeve (4) and the slag bag (6).

3. The mold core structure according to claim 1, characterized in that, The exhaust groove is located between the upper exhaust plate (210) and the lower exhaust plate (308). The upper exhaust plate (210) and the lower exhaust plate (308) are respectively provided with matching grooves (211) and bosses (309). The grooves (211) and bosses (309) are arranged in a horizontal direction, so that the exhaust groove is wavy.

Images