Wax injection mold

Abstract

The utility model relates to the technical field of wax mould production, in particular to a wax injection mould which comprises a left mould, a right mould, a base, a pouring cup and an iron core assembly, the pouring cup is arranged on the base, a cavity is formed between the left mould and the right mould when the left mould and the right mould are assembled, and the iron core assembly and the pouring cup are both located in the cavity; a magnetic part is arranged on the pouring cup, and the bottom surface of the iron core assembly is attached to the top surface of the magnetic part. The pouring cup overcomes the defect that the quality of a wax mold product is affected due to the fact that the iron core is prone to shaking, inclining or deviating in the prior art, the magnetic piece is arranged on the pouring cup, the iron core assembly can be prevented from shaking, inclining or deviating in the production process through the adsorption effect of the magnetic piece on the iron core assembly, and the production efficiency is improved. And the accurate position of the iron core assembly in the cavity of the mold is kept, so that the size precision and the shape precision of a wax mold product are improved, and the quality of the wax mold product is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wax pattern production, and more specifically to a wax injection mold. Background Art

[0002] Lost wax casting is a casting process in which molten metal is poured into a wax pattern. After the metal cools and solidifies, the wax pattern is broken or dissolved to produce the cast metal part.

[0003] The purpose of a wax injection mold is to create a wax pattern. By injecting molten wax into the mold cavity, the wax pattern for lost wax casting is formed. The iron core is a key component of the wax injection mold, forming the internal cavity of the wax pattern. After the wax pattern cools and solidifies, the wax pattern and the iron core encased in it must be removed. After separating the wax pattern from the iron core, the iron core can be inserted back into the wax injection mold.

[0004] However, in the prior art, the iron core is directly inserted into the pouring cup of the wax mold. In the actual production process, due to factors such as mechanical vibration, manual operation errors or thermal expansion and contraction of materials, it is often difficult for the iron core to maintain a stable centering state, but rather a certain degree of shaking, tilting or offset will occur. On the one hand, it will affect the size and shape accuracy of the internal cavity of the wax mold; on the other hand, it will affect the strength and integrity of the wax mold. If the iron core is not in the correct position, it may cause insufficient local support of the wax mold, affecting its overall strength, making it more prone to breakage or deformation in subsequent processes such as demolding and casting, which directly affects the qualified rate of the finished product of the wax mold. At the same time, if the iron core is partially exposed outside the wax mold due to inaccurate positioning, it will not only affect the aesthetics of the wax mold, but may also become the source of casting defects such as air holes, inclusions and other defects. Utility Model Content

[0005] In view of the problem in the above-mentioned prior art that the iron core is prone to shaking, tilting or shifting, which affects the quality of the wax mold product, the utility model provides a wax injection mold, which can avoid the shaking and shifting of the iron core and ensure the quality of the wax mold product.

[0006] In order to solve the above technical problems, the technical solution provided by the present invention is:

[0007] A wax injection mold includes a left mold, a right mold, a base, a pouring cup and an iron core assembly. The pouring cup is arranged on the base. When the left mold and the right mold are closed, a cavity is formed between the two. The iron core assembly and the pouring cup are both located in the cavity. A magnetic part is provided on the pouring cup, and the bottom surface of the iron core assembly is in contact with the top surface of the magnetic part.

[0008] In the above technical solution, a magnetic part is used to absorb the bottom surface of the core assembly. When mechanical vibration or other factors that may cause the core assembly to shake and shift occur, the bottom surface of the core assembly is firmly adsorbed on the upper surface of the magnetic part, which can prevent the core assembly from shaking, tilting or shifting, so that the core assembly and the pouring cup remain relatively fixed, thereby maintaining the precise position of the core assembly in the cavity of the mold, which can improve the dimensional accuracy and shape accuracy of the wax mold product and improve the quality of the wax mold product.

[0009] It should be noted that both the left mold and the right mold are existing technologies, so this specification will not further describe their specific structures and working processes in detail.

[0010] Since the core assembly needs to be frequently installed and removed from the pouring cup, in order to facilitate the staff to quickly position the core assembly to the installation position of the pouring cup, preferably, the pouring cup is provided with a positioning protrusion, the core assembly is provided with a threaded hole, or the pouring cup is provided with a positioning protrusion, the core assembly is provided with a threaded hole; the positioning protrusion is at least partially threadedly connected to the threaded hole. The positioning protrusion and the threaded hole can facilitate the staff to quickly position the core assembly to the installation position of the pouring cup, thereby quickly installing the core assembly on the pouring cup, which is conducive to shortening the production cycle. At the same time, by positioning the core assembly, deviations in the installation position of the core assembly can be avoided, which may affect the shape accuracy of the wax mold product. Moreover, the cooperation between the positioning protrusion and the threaded hole can also limit the shaking and deviation of the core assembly to a certain extent, thereby further improving the stability of the core assembly.

[0011] Preferably, the magnetic member is provided with a through cavity, with the positioning projection partially extending into the through cavity and the remaining portion positioned outside the through cavity and threadedly connected to the threaded hole. The positioning projection partially extending into the through cavity can restrict horizontal movement of the magnetic member relative to the pouring cup, thereby maintaining a relatively stable position between the magnetic member and the core assembly.

[0012] In one preferred solution, the positioning protrusion is provided on the pouring cup.

[0013] Preferably, the positioning protrusion is provided with a limit portion, which abuts against the top surface of the magnetic member. The limit portion presses the magnetic member from above and presses the magnet tightly against the pouring cup, thereby limiting the vertical movement of the magnetic member and maintaining a more stable state of the magnetic member.

[0014] The connection between the positioning protrusion and the pouring cup can be achieved by snapping, bonding or screw connection. Preferably, the positioning protrusion is connected to the pouring cup by screws, so that the positioning protrusion and the pouring cup can form a relatively firm connection.

[0015] Preferably, the top surface of the pouring cup has a mounting groove, into which the magnetic element is embedded and abuts against the inner wall of the groove. The mounting groove further restricts the horizontal movement of the magnetic element. Furthermore, placing the magnetic element in the mounting groove reduces the area of ​​the magnetic element exposed to the outside of the pouring cup, thereby reducing the contact area between the magnetic element and the wax mold product, thereby reducing the resistance to demolding the wax mold product.

[0016] Preferably, the top surface of the magnetic element is flush with the top surface of the pouring cup. This further reduces the contact area between the magnetic element and the wax product, thereby further reducing the resistance to demolding. Furthermore, the flushness of the top surface of the magnetic element with the top surface of the pouring cup prevents sharp corners in the wax product, which can easily lead to stress concentration, thereby preventing defects such as cracks in the wax product during demolding.

[0017] Among them, the magnetic parts can be made of rare earth permanent magnet materials with high magnetic energy product and high coercive force. Preferably, the magnetic parts are made of neodymium iron boron material. Magnetic parts made of neodymium iron boron material have extremely high magnetic energy product and can provide a strong magnetic field to effectively adsorb and fix the core components. Moreover, due to its high magnetic properties, magnetic parts made of neodymium iron boron material can generate strong magnetic force despite its small size, which helps save space and material costs. In addition, neodymium iron boron material can maintain stable magnetic properties even in high temperature environments and has a long service life and durability.

[0018] Preferably, the side of the pouring cup is provided with a conical surface, with the diameter of the conical surface on the side closest to the core assembly being larger than the diameter of the other side. This conical surface makes it easier for the wax mold to be released from the pouring cup, reducing the risk of damage to the wax mold product during demolding and improving the surface quality of the wax mold product. To further reduce the risk of damage to the wax mold product during demolding, a rounded corner can be provided between the conical surface and the top surface of the pouring cup.

[0019] Beneficial effects of the utility model:

[0020] (1) By arranging a magnetic part on the pouring cup and utilizing the adsorption effect of the magnetic part on the core assembly, the core assembly can be prevented from shaking, tilting or shifting during the production process, and the core assembly can be kept in the precise position within the mold cavity, thereby improving the dimensional accuracy and shape accuracy of the wax mold product and improving the quality of the wax mold product.

[0021] (2) A positioning protrusion is provided on the pouring cup, and a threaded hole is opened on the bottom surface of the core assembly. The core assembly is positioned using the positioning protrusion, which allows the staff to quickly position the core assembly to the installation position of the pouring cup and quickly install the core assembly on the pouring cup, thereby shortening the production cycle. At the same time, the positioning protrusion can further improve the stability of the core assembly.

[0022] (3) The magnetic part is pressed against the pouring cup by the limiting portion of the positioning protrusion, and the magnetic part is embedded in the installation groove on the top surface of the pouring cup, which has high stability and is conducive to improving the stability of the core assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of a wax injection mold in the mold opening state;

[0024] Figure 2 This is a schematic diagram of the pouring cup and the core assembly in the connected state;

[0025] Figure 3 It is an exploded diagram of the pouring cup and core assembly;

[0026] Figure 4 It is a structural diagram of the core assembly;

[0027] Figure 5 This is a schematic diagram of the connection between the pouring cup, magnetic part and positioning protrusion.

[0028] In the accompanying drawings: 1-left mold; 2-right mold; 3-base; 4-pouring cup; 401-mounting groove; 402-conical surface; 5-core assembly; 501-core; 502-nut; 5021-threaded hole; 6-magnetic part; 601-through cavity; 7-positioning protrusion; 701-limiting part. DETAILED DESCRIPTION

[0029] The drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate the embodiments, some components in the drawings may be omitted, enlarged, or reduced in size, and do not represent actual product dimensions. Those skilled in the art will understand that some well-known structures and their descriptions may be omitted from the drawings. The positional relationships depicted in the drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0030] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "long", "short", etc. indicating directions or positional relationships, they are based on the directions or positional relationships shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0031] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0032] Example 1

[0033] like Figure 1 and Figure 2 The wax injection mold shown includes a left mold 1, a right mold 2, a base 3, a pouring cup 4, and a core assembly 5. The pouring cup 4 is mounted on the base 3. When the left and right molds 1 and 2 are closed, a cavity is formed between them. The core assembly 5 and the pouring cup 4 are both located within the cavity. Furthermore, a magnetic member 6 is mounted on the pouring cup 4, and the bottom surface of the core assembly 5 is in contact with the top surface of the magnetic member 6.

[0034] It should be noted that the left mold 1 and the right mold 2 are both existing technologies, so their specific structures and working processes are no longer described in detail.

[0035] The working principle or workflow of this embodiment is as follows: the bottom surface of the core assembly 5 is attracted by the magnetic part 6. When mechanical vibration or other factors that may cause the core assembly 5 to shake and shift occur, the bottom surface of the core assembly 5 is firmly adsorbed on the upper surface of the magnetic part 6, which can prevent the core assembly 5 from shaking, tilting or shifting, so that the core assembly 5 and the pouring cup 4 remain relatively fixed, thereby maintaining the precise position of the core assembly 5 in the cavity of the mold, and ultimately ensuring that the wax mold product has high size and shape accuracy.

[0036] The beneficial effects of this embodiment are as follows: by arranging a magnetic part on the pouring cup and utilizing the adsorption effect of the magnetic part on the core assembly, the core assembly can be prevented from shaking, tilting or shifting during the production process, and the core assembly can be kept in the precise position within the cavity of the mold, thereby improving the dimensional accuracy and shape accuracy of the wax mold product and improving the quality of the wax mold product.

[0037] Example 2

[0038] Since the core assembly 5 needs to be frequently installed and removed from the pouring cup 4, in order to facilitate the staff to quickly locate the core assembly 5 to the installation position of the pouring cup 4, this embodiment is further optimized based on the embodiment 1. Figures 1 to 5As shown, the pouring cup 4 is provided with a cylindrical positioning protrusion 7, one end of which protrudes from the top surface of the pouring cup 4. The core assembly 5 includes an iron core 501 and a nut 502 connected to the iron core 501. The bottom surface of the nut 502 is aligned with the top surface of the magnetic member 6, and the nut 502 is provided with a threaded hole 5021. The positioning protrusion 7 is partially threadedly connected to the threaded hole 5021. The provision of the positioning protrusion 7 and the threaded hole 5021 facilitates the rapid positioning of the core assembly 5 in the installation position of the pouring cup 4, thereby facilitating the rapid installation of the core assembly 5 on the pouring cup 4 and shortening the production cycle. Furthermore, positioning the core assembly 5 prevents deviations in the installation position of the core assembly 5, which could affect the shape accuracy of the wax mold product. Furthermore, the cooperation between the positioning protrusion 7 and the threaded hole 5021 can also limit the shaking and deviation of the core assembly 5 to a certain extent, further improving the stability of the core assembly 5.

[0039] Furthermore, a through cavity 601 is defined in the center of the magnetic member 6. A portion of the positioning protrusion 7 extends through the through cavity 601, while another portion is positioned outside the through cavity 601 and threadedly engaged with the threaded hole 5021. The partial insertion of the positioning protrusion 7 into the through cavity 601 limits the horizontal movement of the magnetic member 6 relative to the pouring cup 4, thereby maintaining a relatively stable position between the magnetic member 6 and the core assembly 5.

[0040] Furthermore, a stopper 701 is provided on the positioning protrusion 7. The outer diameter of the stopper 701 is larger than the diameter of the portion of the positioning protrusion 7 that penetrates the through cavity 601. The stopper 701 abuts against the top surface of the magnetic member 6. The stopper 701 presses the magnetic member 6 from above and presses the magnetic member 6 against the pouring cup 4, thereby limiting the vertical movement of the magnetic member 6 and maintaining a more stable state.

[0041] The connection between the positioning protrusion 7 and the pouring cup 4 can be by snapping, gluing, or screwing. In this embodiment, the positioning protrusion 7 is connected to the pouring cup 4 by a screw (not shown). One end of the screw passes from the top of the positioning protrusion 7 to the bottom of the positioning protrusion 7 and then is threadedly connected to the pouring cup 4. This ensures a relatively secure connection between the positioning protrusion 7 and the pouring cup 4.

[0042] Furthermore, a mounting groove 401 is defined on the top surface of the pouring cup 4, into which the magnetic member 6 is embedded, abutting against the inner wall of the groove 401. The mounting groove 401 further restricts the horizontal movement of the magnetic member 6. Furthermore, placing the magnetic member 6 within the mounting groove 401 reduces the area of ​​the magnetic member 6 exposed to the outside of the pouring cup 4, thereby reducing the contact area between the magnetic member 6 and the wax mold product, thereby reducing the resistance to demolding the wax mold product.

[0043] Specifically, the mounting groove 401 is a circular groove, and the magnetic member 6 is in a circular ring shape. Such a shape is conducive to simplifying the processing steps of the mounting groove 401 and the magnetic member 6.

[0044] Furthermore, the top surface of the magnetic element 6 is flush with the top surface of the pouring cup 4. This further reduces the contact area between the magnetic element 6 and the wax product, thereby further reducing the resistance to demolding. Furthermore, the flushness of the top surface of the magnetic element 6 with the top surface of the pouring cup 4 prevents sharp corners in the wax product, which can easily lead to stress concentration, thereby preventing defects such as cracks in the wax product during demolding.

[0045] Furthermore, the magnetic element 6 is made of neodymium iron boron (NdFeB). NdFeB has an extremely high magnetic energy product, providing a strong magnetic field that effectively attracts and secures the core assembly 5. Furthermore, due to its high magnetic properties, NdFeB produces a strong magnetic force despite its small size, saving space and material costs. Furthermore, NdFeB maintains stable magnetic properties even in high-temperature environments, resulting in a long service life and durability.

[0046] Other features, working principles and beneficial effects of this embodiment are consistent with those of embodiment 1.

[0047] Example 3

[0048] This embodiment is based on embodiment 2. Figure 2 or Figure 3 As shown, a conical surface 402 is provided on the side of the pouring cup 4, and the diameter of the conical surface 402 on the side close to the core assembly 5 is larger than the diameter of the other side. Furthermore, a rounded corner is provided between the conical surface 402 and the top surface of the pouring cup 4. The provision of the conical surface 402 makes it easier for the wax mold product to separate from the pouring cup 4, which can reduce the risk of damage to the wax mold product during demoulding, and is conducive to improving the surface quality of the wax mold product. The provision of the rounded corner can further reduce the risk of damage to the wax mold product during demoulding.

[0049] Other features, working principles and beneficial effects of this embodiment are consistent with those of Example 2.

[0050] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description, and it is not necessary and impossible to provide an exhaustive list of all implementation methods. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A wax injection mold, comprising a left mold (1), a right mold (2), a base (3), a pouring cup (4) and an iron core assembly (5), wherein the pouring cup (4) is arranged on the base (3), and when the left mold (1) and the right mold (2) are closed, a cavity is formed between the two, and the iron core assembly (5) and the pouring cup (4) are both located in the cavity, characterized in that: The pouring cup (4) is provided with a magnetic part (6), and the bottom surface of the iron core assembly (5) is in contact with the top surface of the magnetic part (6).

2. A wax injection mold according to claim 1, characterized in that: The pouring cup (4) is provided with a positioning protrusion (7), and the iron core assembly (5) is provided with a threaded hole (5021), or the pouring cup (4) is provided with a positioning protrusion (7), and the iron core assembly (5) is provided with a threaded hole (5021); at least a portion of the positioning protrusion (7) is threadedly connected to the threaded hole (5021).

3. A wax injection mold according to claim 2, characterized in that: A through cavity (601) is provided on the magnetic member (6), a portion of the positioning protrusion (7) penetrates the through cavity (601), and another portion is located outside the through cavity (601) and is threadedly connected to the threaded hole (5021).

4. A wax injection mold according to claim 3, characterized in that: The positioning protrusion (7) is arranged on the pouring cup (4).

5. A wax injection mold according to claim 4, characterized in that: A limiting portion (701) is provided on the positioning protrusion (7), and the limiting portion (701) abuts against the top surface of the magnetic component (6).

6. A wax injection mold according to claim 4, characterized in that: The positioning protrusion (7) is connected to the pouring cup (4) via screws.

7. The wax injection mold according to claim 1, characterized in that: A mounting groove (401) is provided on the top surface of the pouring cup (4), and the magnetic component (6) is embedded in the mounting groove (401) and fits with the inner wall of the mounting groove (401).

8. A wax injection mold according to claim 7, characterized in that: The top surface of the magnetic member (6) is flush with the top surface of the pouring cup (4).

9. The wax injection mold according to claim 1, characterized in that: The magnetic component (6) is made of neodymium iron boron material.

10. A wax injection mold according to any one of claims 1 to 9, characterized in that: A conical surface (402) is provided on the side of the pouring cup (4), and the diameter of the conical surface (402) on the side close to the iron core assembly (5) is larger than the diameter of the other side.

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