Core print positioning mechanism in sand casting mold

Abstract

The utility model relates to the technical field of sand casting molds, and discloses a core print positioning mechanism in a sand casting mold, which comprises a lower mold base and an upper mold base, the upper mold base is attached to the top of the lower mold base, the bottom end of the upper mold base is provided with a second cavity, the top of the lower mold base is provided with a first cavity, and the first cavity is provided with a second cavity. A core seat is vertically arranged between the upper die seat and the lower die seat, and core heads are fixedly connected to the top end and the bottom end of the core seat. According to the core head positioning mechanism in the sand mold casting mold, the upper connecting base, the lower connecting base, the positioning base, the external connecting plate, the inserting base and the sealing layer are arranged, the core base is fixed in an all-around mode, it is ensured that the core base cannot be inclined or shake in the casting production period, the firmness of the core base in the upper mold base and the lower mold base is enhanced, and the production efficiency is improved. The problems that the production quality of a casting is easily influenced by displacement of a core head during casting production, so that a core seat cannot be powerfully fixed in a mold, and the casting productivity is greatly reduced are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of sand casting molds, in particular to a core head positioning mechanism in a sand casting mold. Background Art

[0002] Sand casting is a casting method that produces castings in sand molds. It is suitable for the gradual production of steel, iron and most non-ferrous alloys. The casting mold plays a vital role. In order to obtain the structural shape of the part, the structural shape of the part is made in advance with other easily moldable materials. The mold is placed in the sand mold to form a cavity with the same size as the part structure. A flowing liquid is poured into the cavity. After the liquid cools and solidifies, a part with the same shape and structure as the mold can be formed.

[0003] During the sand casting process, positioning the sand core is one of the key steps to ensure the quality of the casting. Sand core positioning is mainly achieved through the core head. The core head is the part of the sand core that extends out of the casting and does not come into contact with the molten metal. However, during the production of existing castings, the core head displacement is easily affected, affecting the production quality of the casting. As a result, the core seat cannot be effectively fixed in the mold, greatly reducing the casting productivity.

[0004] Therefore, a novel core head positioning mechanism in a sand casting mold is proposed to solve the above problems. Utility Model Content

[0005] The purpose of the present invention is to provide a core head positioning mechanism in a sand casting mold to solve the problem proposed in the above-mentioned background technology that the core head displacement during the casting production easily affects the production quality of the casting, resulting in the core seat being unable to be firmly fixed in the mold, thereby greatly reducing the casting productivity.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a core head positioning mechanism in a sand casting mold, comprising a lower mold base and an upper mold base, wherein the upper mold base is fitted on the top of the lower mold base, a second cavity is defined at the bottom end of the upper mold base, a first cavity is defined at the top of the lower mold base, a core base is vertically disposed between the upper mold base and the lower mold base, a core head is fixedly connected to the top and bottom ends of the core base, and a positioning component that is easy to disassemble and assemble is disposed between the first cavity and the second cavity;

[0007] The positioning assembly includes an upper connecting seat and a lower connecting seat, a second fixing groove is provided through the center of the bottom end of the first cavity, a first fixing groove is provided through the center of the top end of the second cavity, the top end of the upper connecting seat is fixedly connected to the top end of the first fixing groove, the bottom end of the lower connecting seat is fixedly connected to the bottom end of the second fixing groove, multiple groups of sockets are fixedly connected to the inner walls of the upper connecting seat and the lower connecting seat, an external connecting plate is fixedly connected to the center of the outer end of the socket in a transverse direction, a circle of sealing layer is fixedly connected to the inner walls of the upper connecting seat and the lower connecting seat, and the thickness of the sealing layer is the same as the width of the socket;

[0008] Preferably, a plurality of grooves are provided through the outer end of the core head, the grooves correspond to the external plates one by one, the external plates are plugged into the inside of the grooves, and the outer wall of the socket fits with the outer wall of the core head.

[0009] Preferably, positioning seats are fixedly connected to both sides of the first fixing groove and the second fixing groove, and the positioning seats are symmetrically distributed about the vertical center lines of the upper connecting seat and the lower connecting seat.

[0010] Preferably, a plurality of groups of ventilation holes are formed through the surface of the core base, and the ventilation holes are spirally arranged at equal intervals on the surface of the core base, and the ventilation holes are in the shape of long strips.

[0011] Preferably, the top and bottom ends of the core seat are fixedly connected with discs, the outer ends of the discs are fixedly connected to the ports of the core head, the outer walls of the discs are fixedly connected with multiple groups of connecting frames, the outer ends of the connecting frames are fixedly connected to the inner walls of the core seat, filling layers are provided at the gaps inside the core seat, and three groups of support rods are fixedly connected between the two groups of discs.

[0012] Preferably, a sealing circular plate is fixedly connected to the inner end of the core head, a circle of connecting grooves is provided on the inner end of the core head, and a circle of inserting plates is fixedly connected to the outer end of the core seat.

[0013] Preferably, the plug plate is plug-connected inside the connecting groove, and the connecting groove is located outside the sealing circular plate.

[0014] Preferably, the outer end of the sealing circular plate is fixedly connected to a circle of inner groove, the interior of the connecting groove is fixedly connected to an adhesive inner layer, and the outer end of the plug plate is fixedly connected to the inner end of the adhesive inner layer.

[0015] Compared with the prior art, the beneficial effects of the present invention are: the core head positioning mechanism in the sand casting mold not only realizes the positioning and installation functions, the supporting and fixing functions, but also realizes the sealing and protection functions;

[0016] (1) By providing an upper connecting seat, a lower connecting seat, a positioning seat, an external plate, a socket and a sealing layer, the core heads fixed at both ends of the core seat are respectively inserted into the interior of the upper connecting seat and the lower connecting seat, and the external plate is fixed in the groove by plug-in connection, so as to fix the core seat in all directions, thereby ensuring that the core seat will not be affected by tilting and shaking during the production of castings, strengthening the firmness of the core seat inside the upper die seat and the lower die seat, and improving the accuracy of the castings. Two sets of positioning seats are used to limit and fix the two sides of the upper connecting seat and the lower two seats, while preventing the metal liquid from being introduced into the interior of the first fixing groove and the second fixing groove, thereby playing a role of strong isolation;

[0017] (2) By providing a fixed disc, a support rod, a connecting frame, a filling layer and vent holes, a plurality of vent holes are opened on the surface of the core seat to provide ventilation space, allowing gas and impurities to be discharged smoothly from the casting to ensure the quality of the casting. The support rod and the connecting frame cooperate with each other to strengthen the fixation of the core seat itself and avoid breakage during processing and production that affects its use. At the same time, the filling layer is added to strengthen the firmness of the gap in the core seat;

[0018] (3) By providing a core head, a sealing circular plate, an inner groove, an adhesive inner groove and a connecting groove, two sets of core heads are fixedly installed at both ends of the core seat. The sealing circular plate is used to strengthen the sealing of the connection between the core head and the core seat to prevent the intrusion of molten metal. The insert plate and the connecting groove cooperate with each other to enhance the connection force between the core head and the core seat by overlapping each other, thereby preventing the core head from falling off. The adhesive inner layer is used to strengthen the viscosity of the core head, maintain the stability of the core head and prevent deformation of the casting. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the front cross-sectional structure of the present utility model;

[0020] Figure 2 This is a bottom view of the upper connecting seat of the present invention;

[0021] Figure 3 This is a schematic diagram of the cross-sectional structure of the core seat of the utility model from top view;

[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of the core head of the present invention when viewed from above.

[0023] In the figure: 1. lower mold base; 2. first cavity; 3. upper mold base; 4. first fixing groove; 5. upper connecting base; 6. second cavity; 7. groove; 8. core head; 9. core base; 10. vent hole; 11. second fixing groove; 12. lower connecting base; 13. sealing layer; 14. socket; 15. external plate; 16. positioning seat; 17. connecting frame; 18. filling layer; 19. support rod; 20. disc; 21. plug-in plate; 22. connecting groove; 23. pasting inner layer; 24. inner groove; 25. sealing circular plate. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] Example 1: Please refer to Figure 1-4 A core head positioning mechanism in a sand casting mold includes a lower mold base 1 and an upper mold base 3. The upper mold base 3 is fitted on the top of the lower mold base 1. A second cavity 6 is opened at the bottom end of the upper mold base 3. A first cavity 2 is opened at the top of the lower mold base 1. A core base 9 is vertically arranged between the upper mold base 3 and the lower mold base 1. The top and bottom ends of the core base 9 are fixedly connected to a core head 8. A positioning component that is easy to disassemble and assemble is provided between the first cavity 2 and the second cavity 6.

[0026] The positioning assembly includes an upper connecting seat 5 and a lower connecting seat 12. A second fixing groove 11 is provided at the center of the bottom end of the first cavity 2, and a first fixing groove 4 is provided at the center of the top end of the second cavity 6. The top end of the upper connecting seat 5 is fixedly connected to the top end inside the first fixing groove 4, and the bottom end of the lower connecting seat 12 is fixedly connected to the bottom end inside the second fixing groove 11. Multiple groups of sockets 14 are fixedly connected to the inner walls of the upper connecting seat 5 and the lower connecting seat 12. An external connecting plate 15 is laterally fixedly connected to the center of the outer end of the socket 14. A circle of sealing layer 13 is fixedly connected to the inner walls of the upper connecting seat 5 and the lower connecting seat 12. The thickness of the sealing layer 13 is the same as the width of the socket 14.

[0027] The outer end of the core head 8 is provided with multiple groups of grooves 7, and the grooves 7 correspond to the external plates 15 one by one. The external plates 15 are plugged into the inner part of the grooves 7, and the outer wall of the socket 14 fits with the outer wall of the core head 8;

[0028] Both sides of the first fixing groove 4 and the second fixing groove 11 are fixedly connected with positioning seats 16, and the positioning seats 16 are symmetrically distributed about the vertical center lines of the upper connecting seat 5 and the lower connecting seat 12;

[0029] Specifically, if Figure 1 and Figure 2 As shown, when in use, the two sets of core heads 8 are respectively inserted into the upper connecting seat 5 and the lower connecting seat 12, and the external connecting plate 15 is inserted and fixed inside the groove 7 to effectively fix the core head 8, ensuring that the core seat 9 is fixedly installed as a whole inside the first cavity 2 and the second cavity 6, thereby strengthening the fixation of the core seat 9 itself.

[0030] Embodiment 2: A plurality of vent holes 10 are formed on the surface of the core base 9. The vent holes 10 are arranged spirally at equal intervals on the surface of the core base 9 and are in the shape of long strips.

[0031] The top and bottom ends of the core base 9 are fixedly connected to a disc 20, the outer end of the disc 20 is fixedly connected to the port of the core head 8, the outer wall of the disc 20 is fixedly connected to multiple groups of connecting frames 17, the outer ends of the connecting frames 17 are fixedly connected to the inner wall of the core base 9, and the gaps inside the core base 9 are all provided with a filling layer 18. Three groups of support rods 19 are fixedly connected between the two groups of discs 20;

[0032] Specifically, if Figure 1 and Figure 3 As shown, when in use, several groups of vent holes 10 are opened on the surface of the core seat 9 to provide ventilation space, allowing gas and impurities to be smoothly discharged from the casting to ensure the quality of the casting. The support rod 19 and the connecting frame 17 cooperate with each other to strengthen the fixation of the core seat 9 itself to avoid breakage during processing and production that affects use. At the same time, a filling layer 18 is added to strengthen the firmness of the gaps in the core seat 9.

[0033] Embodiment 3: The inner end of the core head 8 is fixedly connected to a sealing circular plate 25, the inner end of the core head 8 is provided with a circle of connecting grooves 22, and the outer end of the core base 9 is fixedly connected to a circle of inserting plates 21;

[0034] The plug plate 21 is plugged into the inside of the connecting groove 22, and the connecting groove 22 is located outside the sealing circular plate 25;

[0035] The outer end of the sealing circular plate 25 is fixedly connected to an inner groove 24, the interior of the connecting groove 22 is fixedly connected to an adhesive inner layer 23, and the outer end of the insert plate 21 is fixedly connected to the inner end of the adhesive inner layer 23;

[0036] Specifically, if Figure 1 and Figure 4 As shown, when in use, two sets of core heads 8 are fixedly installed at both ends of the core seat 9, and the sealing circular plate 25 is used to strengthen the sealing of the connection between the core head 8 and the core seat 9 to prevent the intrusion of molten metal. The insert plate 21 and the connecting groove 22 cooperate with each other to enhance the connection force between the core head 8 and the core seat 9 by overlapping each other, thereby preventing the core head 8 from falling off. The adhesive inner layer 23 is used to strengthen the viscosity of the core head 8, maintain the stability of the core head 8 and prevent deformation of the casting.

[0037] Working principle: When the utility model is in use, the two sets of core heads 8 are respectively inserted into the upper connecting seat 5 and the lower connecting seat 12, and the external plate 15 is inserted and fixed inside the groove 7 to effectively fix the core head 8, ensuring that the core seat 9 is fixedly installed as a whole inside the first cavity 2 and the second cavity 6. The two sets of core heads 8 are fixedly installed at both ends of the core seat 9, and the sealing circular plate 25 is used to strengthen the sealing of the connection between the core head 8 and the core seat 9 to prevent the intrusion of molten metal.

[0038] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A core head positioning mechanism in a sand casting mold, comprising a lower mold base (1) and an upper mold base (3), characterized in that: The upper die base (3) is fitted on the top of the lower die base (1), a second cavity (6) is provided at the bottom of the upper die base (3), a first cavity (2) is provided at the top of the lower die base (1), a core base (9) is vertically provided between the upper die base (3) and the lower die base (1), a core head (8) is fixedly connected to the top and bottom of the core base (9), and a positioning component for easy disassembly is provided between the first cavity (2) and the second cavity (6); The positioning assembly comprises an upper connecting seat (5) and a lower connecting seat (12); a second fixing groove (11) is provided through the center of the bottom end of the first cavity (2); a first fixing groove (4) is provided through the center of the top end of the second cavity (6); the top end of the upper connecting seat (5) is fixedly connected to the top end of the first fixing groove (4); the bottom end of the lower connecting seat (12) is fixedly connected to the bottom end of the second fixing groove (11); the inner walls of the upper connecting seat (5) and the lower connecting seat (12) are fixedly connected to multiple groups of sockets (14); the centers of the outer ends of the sockets (14) are laterally fixedly connected to an external connecting plate (15); the inner walls of the upper connecting seat (5) and the lower connecting seat (12) are fixedly connected to a circle of sealing layer (13); the thickness of the sealing layer (13) is the same as the width of the sockets (14).

2. The core head positioning mechanism in a sand casting mold according to claim 1, characterized in that: The outer end of the core head (8) is provided with a plurality of groups of grooves (7), the grooves (7) correspond to the external connection plates (15) one by one, the external connection plates (15) are plugged into the inside of the grooves (7), and the outer wall of the socket (14) is in contact with the outer wall of the core head (8).

3. The core head positioning mechanism in a sand casting mold according to claim 1, characterized in that: Positioning seats (16) are fixedly connected to both sides of the first fixing groove (4) and the second fixing groove (11), and the positioning seats (16) are symmetrically distributed about the vertical center lines of the upper connecting seat (5) and the lower connecting seat (12).

4. The core head positioning mechanism in a sand casting mold according to claim 1, characterized in that: A plurality of groups of ventilation holes (10) are provided through the surface of the core seat (9). The ventilation holes (10) are spirally arranged at equal intervals on the surface of the core seat (9), and the ventilation holes (10) are in the shape of long strips.

5. The core head positioning mechanism in a sand casting mold according to claim 1, characterized in that: The top and bottom ends of the core seat (9) are fixedly connected to a disc (20), the outer end of the disc (20) is fixedly connected to the port of the core head (8), the outer wall of the disc (20) is fixedly connected to multiple groups of connecting frames (17), the outer end of the connecting frame (17) is fixedly connected to the inner wall of the core seat (9), the gaps inside the core seat (9) are all provided with a filling layer (18), and three groups of support rods (19) are fixedly connected between two groups of the discs (20).

6. The core head positioning mechanism in a sand casting mold according to claim 1, characterized in that: The inner end of the core head (8) is fixedly connected to a sealing circular plate (25), the inner end of the core head (8) is provided with a circle of connecting grooves (22), and the outer end of the core seat (9) is fixedly connected to a circle of inserting plates (21).

7. The core head positioning mechanism in a sand casting mold according to claim 6, characterized in that: The inserting plate (21) is plug-connected inside the connecting groove (22), and the connecting groove (22) is located outside the sealing circular plate (25).

8. The core head positioning mechanism in a sand casting mold according to claim 6, characterized in that: The outer end of the sealing circular plate (25) is fixedly connected to a circle of inner groove (24), the interior of the connecting groove (22) is fixedly connected to an adhesive inner layer (23), and the outer end of the inserting plate (21) is fixedly connected to the inner end of the adhesive inner layer (23).

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