WO2002053309A1 - Combined casting mold and application in centrifugal casting - Google Patents

Abstract

A combined casting mold comprises at least two mutually matched mold pieces with mold-cavities; each mold piece consists of at least two parting-molds, each parting-mold has at least one mold-cavity, said cavity has at least one flow gate which being in communication with said cavity. Assembling all the parting-molds into a mold with a pouring gate, said flow gate communicates with said pouring gate. The invention may reduce the molding difficulty of each mold, decrease the labor-strength of mold assembly, enhance the adaptability for castings, and be in favor of remodel design for castings.

Description

 Block casting mold and its application in centrifugal casting

Field

 The invention relates to a metal casting, in particular to a casting mold, and in particular to a group-type casting mold. Background technique

 In modern foundry engineering, various casting methods have adopted different forms of stringing schemes to varying degrees, and are especially applied to special casting methods such as centrifugal casting. The string casting is made by using various molding materials and methods to connect a number of internal runners of the same cavity into a whole by a certain component in the pouring system to form different types of casting molds. Each pouring is made by The metal liquid of the same ladle passes through the common pouring system of all cavities, and is distributed to each runner in different filling methods to complete the filling task of all cavities. After cooling and solidification, there are several to dozens. Or even hundreds of castings. At present, this method is widely used in batches to produce various small and medium-sized castings with high technical requirements. Especially, stacked string casting has become one of the advanced casting methods in mass production of castings in the world.

In the serial casting method, a mold is usually formed by stacking and combining a plurality of molds. Each of the molds is provided with a cavity and an inner runner connected to the cavity. It leads to the main runner. After the castings are combined, the main runners pass through each other, and the main runner after the penetration is connected to the gate cup to form a common pouring system. Each layer of the mold of the mold assembly can be made of sand, metal or other mold materials, and is integrally formed. As each layer of the casting is mostly formed with multiple cavities, its molding is difficult. Generally, The same cavity is formed in the first-layer mold to reduce the molding difficulty of the mold assembly. Especially when permanent and semi-permanent molds such as metal molds and ceramic molds are used, the molds are more difficult to manufacture. This permanent semi-permanent mold has high manufacturing cost and poor adaptability to castings, which is not conducive to the modification design of castings. From another perspective, in general, the integrally formed castings are heavy, and when they are assembled and fixed, the labor intensity of the assembly of the casting components will be greatly imposed. Especially in special castings such as centrifugal casting, the symmetry of the shape of each layer of the casting is relatively high, and its manufacturing is more difficult. Summary of invention

 The purpose of the present invention is to provide a group-type casting mold to effectively reduce the difficulty of forming each mold, reduce the labor intensity of assembling the mold components, improve the adaptability to the casting, and facilitate the modification of the casting. design.

 The purpose of the present invention is achieved in such a way that a split-type casting mold includes at least two or more mold pieces that can be matched with each other to form a cavity; each mold piece is formed by at least two parts Pieces are assembled, and each part is provided with at least one cavity. The cavity is provided with at least an inner runner that leads to the cavity. Each part is assembled to form a casting with a straight runner. In the profile, the inner runner is in communication with the straight runner.化 forming. Each parting member may be made of a material such as metal, ceramic, or carbonaceous material.

 The sprue of the casting part assembled from the parting parts can be located at the center of the casting part. The runner can also be located at one end of the casting.

The assembled surfaces corresponding to the two divided parts may be provided with an embedded structure. The block type casting mold of the present invention can be applied to a combined centrifugal casting mold, which includes a bottom plate that can be connected to the vertical shaft of a centrifugal casting machine, and a mold assembly is layered on the bottom plate. The mold assembly includes a mold cavity, a horizontal runner and a straight runner, and a connection mechanism between the mold assembly and the bottom plate; each mold assembly includes at least two mold parts that can cooperate with each other to form at least the cavity; Each of the casting parts is formed by assembling at least two parting parts, and each parting part is provided with at least one cavity, and the cavity is provided with at least a horizontal runner which communicates with the cavity. After the parting parts are assembled, a casting part with a direct runner is formed, and the horizontal runner is in communication with the direct runner.

 The sprue of the casting part assembled by the parting parts can be located at the center of the casting part. The cavity of the casting part assembled by the parting parts is symmetrically arranged with respect to the rotation center of the casting part.

 The bottom of the bottom plate has a detachable connection member with the rotating shaft of the centrifugal casting machine, and the bottom of the bottom plate has a mechanism connectable with the rotating shaft of the centrifugal casting machine.

 The inner cavity of the sprue may be provided with an independent refractory insert.

 Each of the parting parts in the casting part can be hardened and formed from a mixture of a binder and a refractory aggregate. The binder may be an organic binder such as a phenol resin, a furfuryl alcohol resin, or a urethane resin. The adhesive may also be an inorganic adhesive such as a salt of a salt of a salt, a glass, and the like.

 The assembled surfaces corresponding to the two divided parts may be provided with an embedded structure. The engaging structure may be convex and concave.

Since the casting parts in the present invention are composed of parting parts, the number of cavities of each parting part is small, the forming process is much simpler, and the processing difficulty of the casting part cavity is greatly improved. Reduced; when assembling the mold components in the present invention, it can be directly achieved by assembling the mold parts, and the labor intensity of the mold component assembly is reduced; in addition, the mold parts of various different cavities can be installed according to The need to assemble the castings with various different cavities makes the modification design and processing of the castings more flexible. This arbitrarily assembled function is applied to the casting processing of matching castings. Since the matching castings are formed under the same conditions, they have exactly the same metal material characteristics and the same mechanical processing characteristics. Good conditions for processing and assembly. Brief description of the drawings

 FIG. 1 is a schematic structural diagram of Embodiment 1 of the present invention;

 FIG. 1 A-A sectional view of Embodiment 1 of the present invention;

 Figure 3 is a schematic structural diagram of Embodiment 1 of another embodiment of the present invention;

 Figure 4 is a schematic structural diagram of still another embodiment of Example 1 of the present invention;

 FIG. 5 is a schematic structural diagram of Embodiment 2 of the present invention;

 Fig. 6 A-A sectional view of Embodiment 2 of the present invention;

 FIG. 7 is a schematic structural diagram of Embodiment 3 of the present invention;

 Fig. 8 A-A sectional view of the third embodiment of the present invention; the mode for implementing the present invention

Example 1

In the present invention, the foundry pieces are composed of at least two foundry pieces 1, and a corresponding mating surface 2 is provided between the two foundry pieces 1, and corresponding ends of the mating surface 2 are provided with corresponding mating surfaces 2. The cavity 3 and the two castings 1 cooperate with each other to form a complete cavity 3, and each layer of the casting can be provided with more than one cavity 3 to achieve the purpose of mass production. Cavity 3 on 01 00007 In a sprue 4 through which a sprue 5 is connected to form a common pouring system.

 As shown in FIG. 1, this is a first embodiment of the present invention. This embodiment is a combined casting mold for producing a casting by a vertical string casting method, which includes a multilayer casting 1. The profiles 1 are stacked and assembled together, and then fixed by a fixing device into a combined model, which has a common pouring system. The above-mentioned fixing device and method in the present invention can be used in the same manner as in the prior art. ,

 FIG. 2 shows the A-A cross section of FIG. 1. As can be seen from FIG. 2, each casting 1 is composed of at least two parting pieces 11, as in the casting of each layer in the present invention. The profile 1 is formed by assembling the assembling surfaces 12 of the four parting pieces 11. In this embodiment, the assembling surface 12 is arranged longitudinally, and a convex and concave fitting structure 13 is provided on the assembling surface 12. Each of the parting parts 11 is provided with a cavity 3, and an inner runner 4 is formed on the mating surface 2. In this embodiment, a corner of each of the parting members 11 is provided with a circular arc-shaped notch 14. The above-mentioned injector 4 is connected to the arc-shaped notch 14. After the four parting members 11 are combined, there are four sections. The arc-shaped notch 14 is combined to form a casting 1 with a runner 5, so that the runner 5 is located at the center of the casting 1. After the upper casting part and the lower casting part are laminated and combined by the mutual mating surface 2, the straight runner 5 penetrates to form a common pouring system.

As shown in FIG. 3, in each of the parting members 11 of this embodiment, a plurality of cavities 3 may be provided, and each of the cavities 3 is connected with a pouring gate 41, and the pouring gate 41 and the lateral runner 4 Conduction, therefore, each cavity 3 is conductive with the main runner 5. The plurality of cavities 3 in each of the parting pieces 11 may be the same casting shape, which is convenient for forming the parting pieces. The one-type multi-cavity structure can obtain castings that are double the one-type and one-cavity in one pouring, which improves production efficiency. This method is generally used In the mass production of small castings.

 As shown in FIG. 4, the plurality of cavities 3 in each parting member 11 in this embodiment may also be different from each other. It can be used to produce multiple small castings that need to match each other during use. Because the matching castings are formed under the same conditions, they have exactly the same metal material characteristics and the same mechanical processing characteristics, which provide good conditions for subsequent processing and assembly. .

 Each of the parting parts 11 in the casting part 1 in the present invention may be formed by hardening a mixture of a binder and a refractory aggregate, and may also be made of a metal, a ceramic, a carbon shield, or the like. When the parting part 11 is composed of a sand mold or other primary casting material, it is more suitable for the modification design of the casting.

 The casting part 1 in the present invention is composed of a plurality of parting parts 11, and the number of the cavity 3 of each parting part 11 is small, and the forming process is much simpler, so the cavity 3 of the casting part 1 The difficulty of processing is also greatly reduced; and when the components of the mold 1 are assembled into the mold components, the assembly of the part 11 can be directly used to achieve the labor intensity of the assembly of the mold components is reduced. Example 2

Please refer to FIG. 5 and FIG. 6, the basic structure of this embodiment is the same as that of embodiment 1, and details are not described herein again. The difference between this embodiment and Embodiment 1 is that this embodiment is a combined casting mold for producing castings by using a row-type string casting method. In this embodiment, the combined casting mold is directly cast with a gate. The lane 5 is located at one end of the model. The runner 4 is formed by combining runners 18 on the adjacent parting members 11. As shown in FIG. 6, each of the parting parts 11 is provided with a runner 15, a runner 16, and a runner 17 which are mutually conductive. When a plurality of parting parts 11 are combined into a casting part 1, the multi-layered casting parts 1 are vertically overlapped and clamped together in a special fixture to form a combined model. The runner 18 is combined into a horizontal runner 4, and the runner 15 is combined into a distribution straight The runner 51 and the runner 16 are combined into a distribution runner 41. The runner 17 is combined into an inner runner 52, and the straight runner 5, the horizontal runner 4, the distribution runner 51, and the distribution runner 41 communicate with each other to form the combined casting integral casting system.

 In this embodiment, each parting member 11 may also be provided with a plurality of cavities 3, and the plurality of cavities 3 may have the same shape or different shapes.

 Since the basic structure of this embodiment is the same as that of embodiment 1, this embodiment also has the beneficial effects of embodiment 1, and details are not described herein again. Example 3

 As shown in FIG. 7 and FIG. 8, this embodiment is a combined centrifugal casting mold of a group type casting mold, which includes a bottom plate 6 that can be connected to a vertical shaft of a centrifugal casting machine. A mold assembly is assembled in layers, and the mold assembly includes a cavity 3, a horizontal runner 4 and a straight runner 5, and a connection mechanism between the mold assembly and the bottom plate; each mold assembly includes at least two which can cooperate with each other. Together to form at least the castings 1 of the above-mentioned cavity 3; each of the castings 1 described above is composed of at least two parting parts 11, each parting part 11 is provided with at least one cavity 3 The cavity 3 is provided with at least a horizontal runner 4 which is connected to the cavity 3, and each part 11 is assembled to form a casting 1 with a straight runner 5. The lateral runner 4 and The sprue 5 is turned on.

As can be seen from FIG. 8, in this embodiment, each casting part 1 is formed by assembling four sub-parts 11 through a assembling surface 12. In this embodiment, the assembling surface 12 is arranged longitudinally, and a convex-concave fitting structure 13 is provided on the assembling surface 12. Each of the parting parts 11 is provided with a cavity 3, and an inner runner 4 is formed on the mating surface 2. In this embodiment, a corner end of each of the parting members 11 is provided with a circular arc-shaped notch 14, and the above-mentioned inner runner 4 is connected to the circular arc-shaped notch 14, After the parting parts 11 are combined, a four-segment arc-shaped notch 14 is combined to form a casting part 1 with a straight runner 5, so that the straight runner 5 is located at the center of the casting part 1. After the upper casting part and the lower casting part are laminated and combined by the mutual mating surface 2, the straight runner 5 penetrates to form a common pouring system.

 As shown in FIG. 8, in this embodiment, the runner 5 of the casting part 1 of the parting part 11 is located at the center of the casting part. The cavity of the model part 1 assembled by the parting part 11 is symmetrically arranged with respect to the rotation center of the mold.

 As shown in FIG. 7, the bottom of the bottom plate 6 has a detachable connection member 61 with the rotary shaft of the centrifugal casting machine, and a mechanism 7 connected with the rotary shaft of the centrifugal casting machine is provided at the bottom of the bottom plate.

 Each of the parting parts 11 in the casting part 1 can be hardened and formed from a mixture of a binder and a refractory aggregate. The binder may be an organic binder such as a phenol resin, a furfuryl alcohol resin or a urethane resin. The binder may also be an inorganic binder such as a phosphate binder, a glass binder, or the like.

 In this embodiment, the inner cavity of the runner 5 or the runner 4 of the mold assembly may be provided with a separate refractory insert.

 The casting part 1 of this embodiment may also be as shown in FIG. 3. The parting part 11 may be provided with a plurality of cavities 3, and each of the cavities 1 is communicated with an injector 42. The channel 42 is connected to the horizontal runner 4 so that the cavity and the direct runner 5 are connected. In the combined centrifugal casting mold of this embodiment, the mold 1, the parting part 11, and the cavity 3 should be arranged symmetrically with respect to the center of the rotation axis. This type of multi-cavity casting method is mainly used in the mass production of small castings, which can obtain more castings in a single pouring, thereby improving production efficiency.

The multiple cavities 3 in each parting of this embodiment may also be different from each other, but the entire casting The cavity 3 on the profile 1 should be arranged symmetrically with respect to the center of the rotation axis. This structure can be used to produce multiple small castings that need to match each other during use. Because the matching castings are formed under the same conditions, they have exactly the same metal material characteristics and the same mechanical processing characteristics, which provide good conditions for subsequent processing and assembly.

 Since the casting part 1 of this embodiment is composed of multiple parting parts 11, the number of cavities 3 of each parting part 11 is small, and the forming process is much simpler, so the processing of the casting part 1 The difficulty is also greatly reduced; and when the mold 1 component is assembled into a mold component, it can be directly realized by assembling the mold piece 11 to reduce the labor intensity of the mold component assembly.

 The above embodiment is a preferred embodiment of the present invention, and is only used to illustrate the present invention, but not intended to limit the present invention.

Claims

Claim 1. A split-type casting mold including at least two molds that can be matched with each other to form a cavity; characterized in that each mold is composed of at least two parting parts It is assembled into groups, and each part is provided with at least one cavity, and the cavity is provided with at least an inner runner that leads to the cavity. Each part is assembled to form a casting mold with a straight runner. The in-situ runner is in communication with the straight runner.  2. The split-type casting mold according to claim 1, wherein each of the parting parts in the casting part can be hardened by a mixture of a binder and a refractory aggregate.  3. The split-type casting mold according to claim 1, wherein each of the parting parts in the casting part can be made of metal, ceramic, carbonaceous material, or the like.  4. The split-type casting mold according to claim 1, wherein the straight runner of the model part assembled by the parting parts can be located at the center of the model part.  5. The split-type casting mold according to claim 1, wherein the straight runner of the model part assembled by the parting parts can be located at one end of the model part.  6. The assembled casting mold according to claim 1, wherein the assembled surface corresponding to the two divided parts can be provided with an embedded structure. 7. A combined centrifugal casting mold using the block-type casting mold of claim 1, comprising a bottom plate which can be connected to a vertical shaft of a centrifugal casting machine, and a casting component is assembled on the bottom plate in layers, The mold assembly includes a cavity, a horizontal runner and a direct runner, and a connection mechanism between the mold assembly and a bottom plate; each mold assembly includes at least two mold parts that can be mated with each other to form at least the cavity. It is characterized in that each casting part is composed of at least two parting parts, and each parting part is provided with at least one cavity, and the cavity is provided with at least conduction In the horizontal runner of the cavity, casting parts of a direct runner are formed after assembling the parting parts, and the horizontal runner is in communication with the direct runner.  8. The split-type casting mold according to claim 7, wherein the straight runner of the model part assembled by the parting parts can be located at the center of the model part.  9. The split-type casting mold according to claim 7, wherein the cavity of the model part assembled by the parting parts is symmetrically arranged with respect to the rotation center of the mold.  10. The split-type casting mold according to claim 7, characterized in that the bottom of the bottom plate has a detachable connection member with the rotary shaft of the centrifugal casting machine, and the bottom of the bottom plate has a phase which can be connected with the rotary shaft of the centrifugal casting machine. Connected institutions.  11. The split-type casting mold according to claim 7, wherein the inner cavity of the direct runner can be provided with an independent refractory insert.  12. The split-type casting mold according to claim 7, wherein each of the parting parts in the casting part can be hardened and formed by a mixture of a binder and a refractory aggregate.  13. The split-type casting mold according to claim 12, wherein the binder is an organic binder.  14. The assembled casting mold according to claim 13, wherein the organic binder is a phenolic resin, a furfuryl alcohol resin, or a urethane resin.  15. The split-type casting mold according to claim 12, wherein the binder is an inorganic binder.  16. The split-type casting mold according to claim 15, wherein: the inorganic binder is a phosphate binder or a glass binder. 17. The split-type casting mold according to claim Ί, characterized in that said two The assembled surfaces corresponding to the parting pieces can be provided with an embedded structure.  18. The split-type casting mold according to claim 17, wherein the embedded structure of the split surface corresponding to the two parting pieces can be convex-concave.