A composite mold for casting

Abstract

This utility model discloses a composite mold for casting: a general-purpose wooden mold covers the periphery of a 3D replacement sand core, and the general-purpose wooden mold and the 3D replacement sand core are detachably connected; the 3D replacement sand core is a two-part mold, including a first half sand core and a second half sand core, and the middle of the first half sand core and the second half sand core are detachably connected by a general-purpose skeleton. This composite mold is detachable. Because the cost of 3D printed replacement sand cores is low, and because 3D replacement sand cores can be printed at any time due to the existence of drawings, after a batch of castings is completed, the 3D replacement sand cores can be crushed and recycled. When there is a need to cast the same part again, the 3D replacement sand cores can be printed again and connected and combined with the general-purpose wooden mold. This eliminates the storage costs of various 3D replacement sand cores, requiring only the storage of a small number of general-purpose wooden molds and a general-purpose skeleton, greatly saving storage and manufacturing costs compared to the previous large-scale steel structure cavity molds.

Description

Technical Field

[0001] This utility model belongs to the field of casting and relates to a mold, specifically a composite mold for casting. Background Technology

[0002] Existing casting molds are usually steel structure cavity molds. Steel structure cavity molds are more difficult to shape and have higher manufacturing costs. For large castings, steel structure cavity molds are also larger in size. With the updating of casting models and the enrichment of types, a large number of steel structure cavity molds will be generated. These steel structure cavity molds occupy a lot of space and have high storage costs. Utility Model Content

[0003] To address the shortcomings of existing steel structure cavity molds in the background art, this utility model provides a composite mold for casting, comprising a general-purpose wooden mold and a 3D replacement sand core. The general-purpose wooden mold covers the periphery of the 3D replacement sand core, and the general-purpose wooden mold and the 3D replacement sand core are detachably connected. The 3D replacement sand core is made of silica sand through 3D printing, which can print various sand patterns according to requirements. Compared with steel structure cavity molds, it has lower manufacturing costs and stronger plasticity. The general-purpose wooden mold plays a role in covering and reinforcing, and can also reduce the useless volume of the periphery of the 3D replacement sand core, reduce the demand for silica sand raw materials, and further reduce the printing cost of the 3D replacement sand core.

[0004] Furthermore, the aforementioned composite mold for casting also includes a universal skeleton, and the 3D replacement sand core is a two-part type, including a first half sand core and a second half sand core, with the middle parts of the first half sand core and the second half sand core being detachably connected by the universal skeleton.

[0005] The universal skeleton is made of metal, and when combined with the two halves of the 3D replacement sand core, it has the following effects:

[0006] First, the universal skeleton acts as a base for fixation. Connecting to the iron plate below the mold, it solves the problem of insufficient strength caused by directly connecting the 3D replacement sand core to the iron plate. Second, for large castings, limited by the travel of existing 3D printers, the two halves of the 3D replacement sand core are connected by the universal skeleton, which also acts as a support, preventing deformation due to excessive size. Third, the two halves of the 3D replacement sand core and the universal skeleton make the composite mold easier to disassemble. Only the central universal skeleton needs to be removed first, after which the first and second halves of the sand core can be more easily removed sequentially from the universal wooden mold.

[0007] Preferably, the detachable connection is a bolt and screw hole connection, with corresponding screw holes on the contact surfaces of the universal wooden mold and the 3D replacement sand core, corresponding screw holes on the contact surfaces of the first half sand core and the universal skeleton, and corresponding screw holes on the contact surfaces of the second half sand core and the universal skeleton, and each corresponding screw hole is screwed with a bolt.

[0008] Through its technical solution, this utility model has at least the following beneficial effects:

[0009] The composite mold for casting described in this application is detachable. Since the cost of 3D printed replacement sand cores is low, and since 3D replacement sand cores can be printed at any time because of the existence of drawings, the 3D replacement sand cores can be crushed and recycled after a batch of castings is completed. When there is a need to cast the same casting again, the 3D replacement sand cores can be printed out and connected and combined with the universal wooden mold. This eliminates the storage cost of various 3D replacement sand cores. Only a small amount of universal wooden molds and universal skeletons need to be stored. Compared with the previous large number of steel structure cavity molds, this greatly saves storage and manufacturing costs.

[0010] In a further design, the combination of a two-part 3D replacement sand core and a universal skeleton solves the problem of insufficient strength caused by the direct connection of the 3D replacement sand core to the iron plate below the mold; it also avoids the problem of easy deformation of the 3D replacement sand core due to its large size for large castings; and it makes the composite mold easier to disassemble. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of the composite mold for casting described in the embodiments of this application;

[0012] Figure 2 This is a partial schematic diagram of the composite mold for casting described in the embodiments of this application (only the second half sand core and part of the general-purpose wooden mold are shown in the figure).

[0013] Figure 3 for Figure 2 Sectional view of AA. Detailed Implementation

[0014] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of this utility model in a schematic manner. Therefore, they only show the components related to this utility model.

[0015] In the description of this application, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms describing positional relationships are for illustrative purposes only and should not be construed as limiting this patent. If terms such as "first" and "second" are used for descriptive purposes only, they should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of the stated features. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0016] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0017] refer to Figures 1 to 3 A composite mold for casting includes a general-purpose wooden mold 1 and a 3D replacement sand core 2. The general-purpose wooden mold 1 covers the periphery of the 3D replacement sand core 2, and the general-purpose wooden mold 1 and the 3D replacement sand core 2 are detachably connected. The 3D replacement sand core 2 is made of silica sand by 3D printing, which can print various sand patterns according to requirements. Compared with steel structure cavity molds, it has lower manufacturing costs and stronger plasticity. The general-purpose wooden mold 1 plays a role in covering and reinforcing, and can also reduce the useless volume of the periphery of the 3D replacement sand core 2, reduce the demand for silica sand raw materials, and further reduce the printing cost of the 3D replacement sand core 2.

[0018] The aforementioned composite mold for casting also includes a universal skeleton 3. The 3D replacement sand core 2 is a two-part type, including a first half sand core 201 and a second half sand core 202. The middle part of the first half sand core 201 and the middle part of the second half sand core 202 are detachably connected through the universal skeleton 3.

[0019] The universal skeleton 3 is made of metal, and when it is combined with the two halves of the 3D replacement sand core 2, it has the following effects:

[0020] First, the universal skeleton 3 acts as a base for fixation. The universal skeleton 3 is connected to the iron plate below the mold, which solves the problem of insufficient strength caused by the direct connection of the 3D replacement sand core 2 to the iron plate. Second, for large castings, due to the limited stroke of existing 3D printers, the two halves of the 3D replacement sand core 2 are connected by the universal skeleton 3. The universal skeleton 3 also serves as a connecting support, preventing the 3D replacement sand core 2 from easily deforming due to its large size. Third, the two halves of the 3D replacement sand core 2 and the universal skeleton 3 make the composite mold easier to disassemble. After removing the universal skeleton 3 in the middle, the first half sand core 201 and the second half sand core 202 can be more easily removed from the universal wooden mold 1 in sequence.

[0021] In this specific embodiment, reference is made to Figure 2 and Figure 3 The detachable connection is a bolt 4 screw hole connection. Opposite screw holes are opened on the mutual contact surfaces of the general wooden mold 1 and the 3D replacement sand core 2, opposite screw holes are opened on the mutual contact surfaces of the first half sand core 201 and the general skeleton 3, and opposite screw holes are opened on the mutual contact surfaces of the second half sand core 202 and the general skeleton 3. Each opposite screw hole is screwed with a bolt 4.

[0022] The aforementioned composite mold for casting is detachable. Since the cost of 3D printed replacement sand core 2 is low, and since the 3D replacement sand core 2 has drawings that can be printed at any time, after a batch of casting is completed, the 3D replacement sand core 2 can be crushed and recycled. When there is a need to cast the same casting again, the 3D replacement sand core 2 can be printed out and connected and combined with the universal wooden mold 1 and the universal skeleton 3. This eliminates the storage cost of various 3D replacement sand core 2, and only a small number of universal wooden molds 1 and universal skeletons 3 need to be stored. Compared with the previous large number of steel structure cavity molds, this greatly saves storage and manufacturing costs.

[0023] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Based on the present utility model and the above description, relevant personnel can make various changes and modifications without departing from the technical concept of the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A composite mold for casting, characterized in that: It includes a general-purpose wooden mold (1) and a 3D replacement sand core (2), wherein the general-purpose wooden mold (1) covers the periphery of the 3D replacement sand core (2), and the general-purpose wooden mold (1) and the 3D replacement sand core (2) are detachably connected.

2. The composite mold for casting according to claim 1, characterized in that: It also includes a universal skeleton (3), and the 3D replacement sand core (2) is a two-part type, including a first half sand core (201) and a second half sand core (202), and the first half sand core (201) and the second half sand core (202) are detachably connected by the universal skeleton (3).

3. A composite mold for casting according to claim 2, characterized in that: The detachable connection is a bolt (4) screw hole connection form. Opposite screw holes are opened on the mutual contact surfaces of the general wooden mold (1) and the 3D replacement sand core (2), opposite screw holes are opened on the mutual contact surfaces of the first half sand core (201) and the general skeleton (3), and opposite screw holes are opened on the mutual contact surfaces of the second half sand core (202) and the general skeleton (3). Each opposite screw hole is screwed with a bolt (4).

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