Lost foam mold with high space utilization rate

Abstract

The utility model discloses an evanescent mode mould with high space utilization rate, which comprises an upper mould and a lower mould which are mutually buckled together, an upper cavity used for producing an upper evanescent mode white mould and a lower cavity used for producing a lower evanescent mode white mould are arranged between the upper mould and the lower mould, the upper cavity and the lower cavity are both annular, and the upper mould and the lower mould are both annular. The axis of the upper cavity and the axis of the lower cavity coincide and are both vertical, the outer diameter of the upper cavity is smaller than the inner diameter of the lower cavity, the bottom surface of the upper cavity is an upper parting surface, the top surface of the lower cavity is an upper parting surface, the upper die is provided with an upper injection port communicated with the side surface of the upper cavity, and the lower die is provided with a lower injection port communicated with the side surface of the lower cavity. And a lower injection port communicated with the side surface of the lower cavity is formed in the lower mold. According to the utility model, one set of mould can be used for simultaneously producing two types of lost foam white moulds, so that the quantity of moulds is reduced, the capital investment and the occupied space of the moulds are reduced, and meanwhile, the production efficiency can be improved and the production cost can be reduced during production.

Description

Technical Field

[0001] The utility model relates to the technical field of casting molds, in particular to a lost foam mold with high space utilization. Background Art

[0002] Lost foam casting is an advanced green and environmentally friendly casting process. It is a nearly zero-residue, precise molding process that uses foam that disappears when it encounters liquid metal to make the pattern (i.e., lost foam white mold).

[0003] During casting, the lost foam white mold is used as a pattern to make a sand mold, and then liquid metal is poured. The liquid metal vaporizes the lost foam white mold and occupies the cavity of the lost foam white mold, and forms a casting after cooling. Lost foam casting does not require mold removal, has no parting surface, and no sand core, so there is no flash burr, a small draft angle, and reduces the dimensional error caused by the core combination. Therefore, the lost foam casting has a better development prospect and is promoted faster. What follows is that the number of molds for making lost foam is large, the capital investment is large, and a large space is required for storage. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a lost foam mold with high space utilization rate, which is used to solve the problems that the current lost foam molds are large in number, require large capital investment, and occupy large storage space.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A lost foam mold with high space utilization rate comprises an upper mold and a lower mold which are buckled together, an upper cavity for producing an upper lost foam white mold and a lower cavity for producing a lower lost foam white mold are arranged between the upper mold and the lower mold, the upper cavity and the lower cavity are both annular, the axis of the upper cavity coincides with the axis of the lower cavity and are both vertical, the outer diameter of the upper cavity is smaller than the inner diameter of the lower cavity, the bottom surface of the upper cavity is an upper parting surface, the top surface of the lower cavity is a lower parting surface, the upper mold is provided with an upper injection port connected to the side surface of the upper cavity, and the lower mold is provided with a lower injection port connected to the side surface of the lower cavity.

[0007] Furthermore, the upper mold includes an upper mold body and an upper mold core fixedly arranged at the center of the upper mold body, the upper mold cavity is located between the upper mold core and the top of the lower mold, and the upper injection port is located on the side of the upper mold core.

[0008] Furthermore, the lower mold includes a lower mold body and a lower mold core fixedly arranged at the center of the lower mold body, the upper mold cavity is surrounded by the upper mold core, the upper mold body and the lower mold core, the lower mold cavity is surrounded by the lower mold core, the lower mold body and the upper mold body, and the lower injection port is located on the side of the lower mold body.

[0009] Furthermore, the upper parting surface and the lower parting surface are located on the same plane, and the plane is a common parting surface.

[0010] Furthermore, the upper parting surface and the lower parting surface are staggered up and down, and the upper parting surface is higher than the lower parting surface.

[0011] Furthermore, the upper mold body is bowl-shaped, the bottom of the upper mold body is a bottom plate, and the upper parting surface is higher than the top surface of the bottom plate.

[0012] Furthermore, the top of the lower mold core is inserted into the bottom plate, and the matching surface between the lower mold core and the bottom plate is conical.

[0013] Furthermore, the upper die and / or lower die are made of high-hardness cast aluminum metal material, and the material grade is ZL104.

[0014] The positive effects of the utility model are:

[0015] The utility model comprises an upper mold and a lower mold, an upper cavity and a lower cavity between the upper mold and the lower mold, an upper injection port is provided in the upper mold, and a lower injection port is provided in the lower mold, so that the mold space is more reasonably utilized, the space utilization rate of the mold is higher, and two kinds of lost molds can be produced at the same time, thereby reducing the number of molds, reducing the capital investment and space occupied by the molds, and improving production efficiency and reducing production costs during production. The upper parting surface of the upper cavity and the lower parting surface of the lower cavity are staggered, so that the upper injection port is easy to arrange, and the phenomenon of local cross-sectional area reduction will not occur, so that the raw material injection is very smooth. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a top view of Example 1 and Example 2;

[0017] Figure 2 In Example 1 Figure 1 Cross-sectional view of the middle AA part;

[0018] Figure 3 In Example 2 Figure 1 Cross-sectional view of the middle AA part;

[0019] Figure 4 This is a diagram of the use of Example 2;

[0020] Figure 5 is an expanded view of Example 2;

[0021] Figure 6 It is a schematic diagram of the appearance of the upper lost foam white mold;

[0022] Figure 7 It is a schematic diagram of the appearance of the lower lost foam white mold;

[0023] Figure 8It is a schematic diagram of the mold appearance of the existing technology for producing the lost foam white mold;

[0024] Fig. 9 It is a schematic diagram of the appearance of a mold for producing a lost foam white mold in the prior art;

[0025] 1. Upper mold body; 2. Upper injection port; 3. Upper cavity; 4. Lower injection port; 5. Lower cavity; 6. Lower mold core; 7. Lower mold body; 8. Upper parting surface; 9. Lower parting surface; 10. Upper lost foam white mold; 11. Lower lost foam white mold; 12. Public parting surface; 13. Upper mold core. DETAILED DESCRIPTION

[0026] Figure 6 and Figure 7 The following are the lost foam white molds used in the production of two commonly used metal parts on pumps. Figure 6 For the upper lost foam white mold 10, Figure 7 The upper lost foam white mold 10 and the lower lost foam white mold 11 are both annular, the outer diameter of the upper lost foam white mold 10 is smaller than the inner diameter of the lower lost foam white mold 11, and the upper lost foam white mold 10 is thin at the edge and thick in the middle. Figure 8 and Fig. 9 They are respectively a mold for producing an upper lost foam white mold 10 and a mold for producing a lower lost foam white mold 11. Since both molds are composed of an upper and a lower part, both need to have a corresponding structure of the mold, and the upper lost foam white mold 10 and the lower lost foam white mold 11 need to be produced using corresponding molds. Therefore, the mold capital investment is large, a large storage space is required, and the upper lost foam white mold 10 and the lower lost foam white mold 11 need to be produced separately, so the production efficiency is low and the production cost is high.

[0027] Example 1

[0028] like Figure 1 and Figure 2 As shown, a lost foam mold with high space utilization rate includes an upper mold and a lower mold that are buckled together, and an upper cavity 3 for producing an upper lost foam white mold 10 and a lower cavity 5 for producing a lower lost foam white mold 11 are arranged between the upper mold and the lower mold. The upper cavity 3 and the lower cavity 5 are both annular, the middle of the upper cavity 3 is thick and the edge is thin, the axis of the upper cavity 3 and the axis of the lower cavity 5 coincide and are both vertical, the outer diameter of the upper cavity 3 is smaller than the inner diameter of the lower cavity 5, the bottom surface of the upper cavity 3 is an upper parting surface 8, and the top surface of the lower cavity 5 is a lower parting surface 9, the upper mold is provided with an upper injection port 2 connected to the side of the upper cavity 3, and the lower mold is provided with a lower injection port 4 connected to the side of the lower cavity 5.

[0029] The upper mold includes an upper mold body 1 and an upper mold core 13 fixedly arranged at the center of the upper mold body 1. In actual production, the upper mold body 1 and the upper mold core 13 are integrally formed by casting. The upper mold cavity 3 is located between the upper mold core 13 and the top of the lower mold, and the upper injection port 2 is located on the side of the upper mold core 13.

[0030] The lower mold includes a lower mold body 7 and an inverted bowl-shaped lower mold core 6 fixedly connected to the center of the lower mold body 7 by screws. The upper mold cavity 3 is surrounded by an upper mold core 13, an upper mold body 1 and a lower mold core 6. The lower mold cavity 5 is surrounded by a lower mold core 6, a lower mold body 7 and an upper mold body 1. The lower injection port 4 is located on the side of the lower mold body 7.

[0031] The upper mold body 1, the upper mold core 13, the lower mold body 7 and the lower mold core 6 are all made of high-hardness cast aluminum metal material, and the material grade is ZL104.

[0032] The upper parting surface 8 and the lower parting surface 9 are located on the same plane, which is a common parting surface 12 . The matching surfaces of the upper mold body 7 and the lower mold body 7 and the common parting surface 12 are located on the same plane.

[0033] The use process of the utility model is:

[0034] The upper mold body 1 and the lower mold body 7 are buckled together, and then the material is injected into the upper cavity 3 and the lower cavity 5 through the upper injection port 2 and the lower injection port 4 respectively. The material foams and expands in the upper cavity 3 and the lower cavity 5 to form an upper lost mold white mold 10 and a lower lost mold white mold 10 respectively.

[0035] Since the upper lost foam white mold 10 and the lower lost foam white mold 10 can be produced simultaneously by using a set of molds, the number of molds is reduced, the capital investment and the space occupied by the molds are reduced, and the production efficiency can be improved and the production cost can be reduced during production.

[0036] Example 2

[0037] like Figure 3-5 As shown, the difference between this embodiment and embodiment 1 is that:

[0038] The upper parting surface 8 and the lower parting surface 9 are staggered up and down, and the upper parting surface 8 is higher than the lower parting surface 9. The upper mold body 1 is bowl-shaped, and the bottom of the upper mold body 1 is the bottom plate 14, and the upper parting surface 8 is higher than the top surface of the bottom plate 14. The top of the lower mold core 6 is inserted into the bottom plate 14, and the matching surface of the lower mold core 6 and the bottom plate 14 is conical, which facilitates the alignment of the upper mold core 13 and the lower mold core 6, and prevents the upper lost mold white mold 10 from being scrapped due to the misalignment of the upper mold core 13 and the lower mold core 6.

[0039] like Figure 2As shown, in Example 1, since the upper parting surface 8 and the lower parting surface 9 coincide with each other, the outer edge of the upper cavity 3 is low. Since the edge of the upper cavity 3 is thin, the upper injection port 2 can only be connected with the outer circle of the upper cavity 3 near the top, resulting in a smaller local cross-sectional area of ​​the upper injection port 2, resulting in large resistance when injecting raw materials into the upper cavity 3, and in severe cases, local material shortage defects occur.

[0040] And as Figure 3 As shown, since the upper parting surface 8 is higher than the lower parting surface 9, the edge of the upper cavity 3 is higher than the bottom plate 14, so the upper injection port 2 is easy to arrange, and the phenomenon of local cross-sectional area reduction will not occur, so the raw material injection is very smooth.

[0041] The above-mentioned embodiments are described in detail and specifically, and express the preferred embodiments of the utility model. They are only used to illustrate the technical ideas and features of the utility model. The purpose is to enable technicians in this field to understand the content of the utility model and implement it accordingly, but they are not limited to the utility model. The patent scope of the utility model cannot be limited only by this embodiment. That is, all equivalent changes or modifications made to the spirit disclosed by the utility model, for researchers or technicians in this field, within the structure of the utility model, the local improvements within the system and the changes and transformations between subsystems are still within the patent scope of the utility model. At present, the technical solution of this application has been pilot-tested, that is, a small-scale experiment of the product before large-scale mass production; after the pilot test, a user survey was conducted in a small range, and the survey results showed that the user satisfaction was high; now we are preparing for the formal production of the product for industrialization, including intellectual property risk warning surveys.

Claims

1. A lost foam mold with high space utilization, characterized in that: The invention comprises an upper mold and a lower mold which are buckled together, wherein an upper mold cavity (3) for producing an upper lost mold white mold (10) and a lower mold cavity (5) for producing a lower lost mold white mold (11) are arranged between the upper mold and the lower mold, wherein the upper mold cavity (3) and the lower mold cavity (5) are both annular, the axis of the upper mold cavity (3) coincides with the axis of the lower mold cavity (5) and are both vertical, the outer diameter of the upper mold cavity (3) is smaller than the inner diameter of the lower mold cavity (5), the bottom surface of the upper mold cavity (3) is an upper parting surface (8), and the top surface of the lower mold cavity (5) is a lower parting surface (9), the upper mold is provided with an upper injection port (2) which is connected to the side of the upper mold cavity (3), and the lower mold is provided with a lower injection port (4) which is connected to the side of the lower mold cavity (5).

2. The lost foam mold with high space utilization rate according to claim 1, characterized in that: The upper mold comprises an upper mold body (1) and an upper mold core (13) fixedly arranged at the center of the upper mold body (1); the upper mold cavity (3) is located between the upper mold core (13) and the top of the lower mold; and the upper injection port (2) is located on the side of the upper mold core (13).

3. The lost foam mold with high space utilization rate according to claim 2, characterized in that: The lower mold comprises a lower mold body (7) and a lower mold core (6) fixedly arranged at the center of the lower mold body (7); the upper mold cavity (3) is surrounded by the upper mold core (13), the upper mold body (1) and the lower mold core (6); the lower mold cavity (5) is surrounded by the lower mold core (6), the lower mold body (7) and the upper mold body (1); and the lower injection port (4) is located on the side of the lower mold body (7).

4. The lost foam mold with high space utilization rate according to claim 3, characterized in that: The upper parting surface (8) and the lower parting surface (9) are located on the same plane, which is a common parting surface (12).

5. The lost foam mold with high space utilization rate according to claim 3, characterized in that: The upper parting surface (8) and the lower parting surface (9) are staggered up and down, and the upper parting surface (8) is higher than the lower parting surface (9).

6. The lost foam mold with high space utilization rate according to claim 5, characterized in that: The upper mold body (1) is bowl-shaped, the bottom of the upper mold body (1) is a bottom plate (14), and the upper parting surface (8) is higher than the top surface of the bottom plate (14).

7. The lost foam mold with high space utilization rate according to claim 6, characterized in that: The top of the lower mold core (6) is inserted into the bottom plate (14), and the matching surfaces of the lower mold core (6) and the bottom plate (14) are conical.

8. The lost foam mold with high space utilization rate according to claim 1, characterized in that: The upper die and / or lower die are made of high-hardness cast aluminum metal material, and the material grade is ZL104.

Images