Core sand shooting device for axle housing

Abstract

The utility model relates to sand core preparation technical field discloses bridge housing sand core secondary sand shooting manufacturing frock, including work housing and split sand core, the work housing includes front frock housing and rear frock housing, the front frock housing and rear frock housing mutually far apart's one side all are connected with the support foot setting, the front frock housing and rear frock housing both sides all are connected with the connecting plate frame setting, the split sand core is located between the front frock housing and rear frock housing. The utility model connects the front frock housing and rear frock housing through the connecting plate frame, then utilizes the hot core technology to spray the hot core end, utilizes the cold core technology to spray the cold core end between the hot core end, and then completes the forming of sand core, and the hot core end of both ends can resist the high -speed molten steel scour, guarantees production quality and forming rate.

Description

Technical Field

[0001] This utility model relates to the field of sand core preparation technology, specifically to a tooling for secondary sand injection fabrication of bridge shell sand cores. Background Technology

[0002] Using the previously discussed sand-shooting process (or other processes such as cold box, hot box, coated sand, etc.), sand mixed with binder is used to make sand cores in the core box. The prepared sand cores may need to undergo post-processing steps such as grinding, coating (to prevent sand from sticking to the casting), and drying to achieve sufficient strength and precision. The mold (usually composed of an upper box and a lower box, called the "mold") itself has already formed the basic external outline of the casting. The shape of the inner cavity of the mold is the external shape of the casting. The lower box with the sand core is fitted together with the upper box and secured with clamps or pressure irons before pouring.

[0003] When a sand core at room temperature is suddenly surrounded by molten metal at a high temperature (such as molten steel at approximately 1500-1600°C), the surface temperature of the sand core rises rapidly. This causes the binder (resin) on the sand core surface to burn, decompose, and vaporize rapidly, losing its adhesive force. Consequently, the sand grains on the surface detach and are carried away by the molten metal. The molten metal flows into the mold cavity at a certain speed and pressure, generating strong hydrodynamic forces. This flow directly impacts the surface of the sand core, especially when the flow channel is directly opposite a weak point in the sand core, much like water washing away soil, scattering and peeling off the sand grains. Utility Model Content

[0004] The purpose of this invention is to provide a tooling for secondary sand-shooting fabrication of bridge shell sand cores, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a working shell and a split sand core are provided. The working shell includes a front tooling shell and a rear tooling shell. Support feet are connected to the opposite sides of the front tooling shell and the rear tooling shell. Connecting plates are connected to both sides of the front tooling shell and the rear tooling shell. The split sand core is located between the front tooling shell and the rear tooling shell.

[0006] Preferably, the split sand core includes a cold core end, and hot core ends are connected to both ends of the cold core end.

[0007] Preferably, each of the connecting plate frames is provided with a positioning pin on one diagonal side, and positioning holes are provided on both connecting plate frames at positions relative to the positioning pins.

[0008] Preferably, connection holes are provided on one side of the connecting plate frame located on both sides of the front tooling housing and the rear tooling housing.

[0009] Preferably, both ends of the front tooling housing and the rear tooling housing are provided with reinforcing ends corresponding to the hot core ends.

[0010] Preferably, an injection port is provided on one side of the front tooling housing.

[0011] In summary, this application includes the following beneficial technical effects:

[0012] The front and rear tooling housings are connected by a connecting plate frame. Then, a hot core end is sprayed out using a hot core process, and a cold core end is sprayed out a second time between the hot core ends using a cold core process, thereby completing the sand core forming. The hot core ends at both ends can resist the scouring of high-speed molten steel, ensuring production quality and forming rate. Attached Figure Description

[0013] Figure 1 A schematic diagram of the overall structure of the tooling for secondary sand-shooting of the bridge shell core according to this utility model;

[0014] Figure 2 Exploded structural diagram of the tooling for secondary sand injection fabrication of bridge shell sand core of this utility model;

[0015] Figure 3 This is a partial structural diagram of the tooling used for secondary sand injection fabrication of the bridge shell sand core according to this utility model.

[0016] In the diagram: 1. Working housing; 2. Split sand core; 3. Injection port; 4. Reinforcing end; 11. Front tooling housing; 12. Rear tooling housing; 13. Connecting plate frame; 14. Positioning pin; 15. Positioning hole; 16. Connecting hole; 17. Support foot; 21. Cold core end; 22. Hot core end. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-3This utility model provides a technical solution: including a working shell 1 and a split sand core 2. The working shell 1 includes a front tooling shell 11 and a rear tooling shell 12. Support feet 17 are connected to the opposite sides of the front tooling shell 11 and the rear tooling shell 12. The support feet 17 on both sides allow for use from both sides, which is convenient for model setting. Connecting plates 13 are connected to both sides of the front tooling shell 11 and the rear tooling shell 12. The front tooling shell 11 and the rear tooling shell 12 are spliced ​​into a whole through the connection of the connecting plates 13. The split sand core 2 is located between the front tooling shell 11 and the rear tooling shell 12, and a molding cavity is left between the split sand core 2 and the front tooling shell 11 and the rear tooling shell 12. An injection port 3 is opened on one side of the front tooling shell 11.

[0019] Reference Figure 2 As shown, the split sand core 2 includes a cold core end 21, and hot core ends 22 are connected to both ends of the cold core end 21. The hot cores 22 at both ends are prepared by the hot box process and have high strength and refractory resistance to resist the erosion of high temperature molten steel. Reinforcing ends 4 are connected to both ends of the front tooling shell 11 and the rear tooling shell 12 corresponding to the hot core ends 22. The extended reinforcing ends 4 can enhance the forming of the internal hot core ends 22.

[0020] Reference Figure 2 As shown, each of the two connecting plate frames 13 is provided with a positioning pin 14 on one diagonal side. Positioning holes 15 are provided on both connecting plate frames 13 relative to the positioning pins 14. When the front tooling housing 11 and the rear tooling housing 12 are connected, the connecting plate frames 113 are connected by aligning the positioning pins 14 with the positioning holes 15. One side of the connecting plate frames 13 located on both sides of the front tooling housing 11 and the rear tooling housing 12 is provided with a connecting hole 16. After the connecting plate frames 13 are connected, they are fixed by bolts through the connecting holes 16 to ensure the connection effect of the front tooling housing 11 and the rear tooling housing 12.

[0021] The implementation principle of this application is as follows: When this utility model is used, the front tooling housing 11 and the rear tooling housing 12 are joined together by connecting plate frame 13. During the joining, the positioning pin 14 is inserted into the positioning hole 15 for positioning to complete the tooling joining. First, the hot core end 22 at both ends is prepared at the position of the reinforcing end 4 by using hot core process. Then, the cold core process is used for secondary sandblasting to sandblast the cold core end 21 between the hot core end 22 to complete the sand core forming.

[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, 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.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tooling for secondary sand-shooting fabrication of bridge shell sand cores, comprising a working shell (1) and a split sand core (2), characterized in that: The working housing (1) includes a front tooling housing (11) and a rear tooling housing (12). Support feet (17) are connected to the sides of the front tooling housing (11) and the rear tooling housing (12) that are far apart from each other. Connecting plate frames (13) are connected to both sides of the front tooling housing (11) and the rear tooling housing (12). The split sand core (2) is located between the front tooling housing (11) and the rear tooling housing (12).

2. The tooling for secondary sand-shooting fabrication of bridge shell sand cores according to claim 1, characterized in that: The split sand core (2) includes a cold core end (21), and hot core ends (22) are connected to both ends of the cold core end (21).

3. The tooling for secondary sand-shooting fabrication of bridge shell sand cores according to claim 1, characterized in that: Each of the connecting plate frames (13) is provided with a positioning pin (14) on one diagonal side, and positioning holes (15) are provided on both connecting plate frames (13) relative to the positioning pins (14).

4. The tooling for secondary sand-shooting fabrication of bridge shell sand cores according to claim 1, characterized in that: Connection holes (16) are provided on one side of the connecting plate frame (13) located on both sides of the front tooling housing (11) and the rear tooling housing (12).

5. The tooling for secondary sand-shooting fabrication of bridge shell sand cores according to claim 2, characterized in that: The front tooling housing (11) and the rear tooling housing (12) are both connected to the corresponding hot core end (22) with a reinforcing end (4).

6. The tooling for secondary sand-shooting fabrication of bridge shell sand cores according to claim 1, characterized in that: An injection port (3) is provided on one side of the front tooling housing (11).

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