3D printing coreless process structure

Abstract

The utility model discloses a 3D printing coreless process structure, and relates to the technical field of casting, a lower box and an upper box are installed, a pouring cavity is formed in the lower box and the upper box after the lower box and the upper box are installed, a lower core is arranged in the middle of the interior of the lower box, an upper core is arranged on the lower portion of the interior of the upper box, and the upper core and the lower core are integrated to achieve modeling of the pouring cavity. And the lower box and the upper box are integrally formed through 3D printing, mold opening is abandoned, the upper core and the lower core are combined with the lower box and the upper box, and a coreless technological structure is adopted. The lower box and the upper box are integrally formed through 3D printing, mold opening is abandoned, the development period is shortened, the upper core and the lower core are combined with the lower box and the upper box, a coreless process structure is adopted, and the problems that due to the fact that a traditional core body and a box body are installed after being manufactured in a split mode, the steps of equipment installation and disassembly are complex, and the cost is low are solved. And tolerance accumulation can occur, so that the machining precision of the casting part is influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing, and in particular to a 3D printing coreless process structure. Background Art

[0002] A casting mold is a material that is made of other easily moldable materials in advance to obtain the structural shape of a part. The mold is then placed in a sand mold, so that a cavity with the same size as the part is formed in the sand mold. A flowing liquid is then poured into the cavity, and after the liquid cools and solidifies, a part with the same shape and structure as the mold can be formed. Casting molds are an important part in the casting process.

[0003] The casting mold consists of an upper and lower box and an internal core material structure. The mold development cycle is long and requires core placement. The operation is difficult and not conducive to controlling dimensional accuracy. For this reason, we propose a 3D printing coreless process structure. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a 3D printing coreless process structure to solve the technical problem of low precision after the development and combination of traditional molds and cores.

[0006] (II) Technical solution

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A 3D printing coreless process structure, comprising

[0009] The lower box and the upper box form a casting cavity inside after the lower box and the upper box are installed. A lower core is arranged in the middle of the lower box, and an upper core is arranged in the lower part of the upper box. The upper core and the lower core are combined to realize the modeling of the casting cavity and realize subsequent casting.

[0010] Preferably, the lower box and the upper box are integrally formed by 3D printing, without mold opening, reducing the development cycle, and the upper core and the lower box are combined with the upper box to adopt a coreless process structure.

[0011] Preferably, the shapes and sizes of the upper core and the lower groove are designed and matched accordingly according to the requirements of use. In addition, an upper groove is provided in the upper box, and a lower groove is provided in the lower box. The inner concave of the upper and lower grooves can better match the raised structure.

[0012] Preferably, three groups of positioning blocks are provided at the four upper corners of the lower box, and grooves are provided at the corresponding positions of the upper box for easy positioning. The positioning blocks are used to assemble and dock the lower box and the upper box, thereby improving the convenience of installation.

[0013] Preferably, an air vent is provided at the upper end of the upper box, and a valve switch is provided in the air vent to release air from the casting cavity to achieve air pressure balance in the cavity.

[0014] (III) Beneficial effects

[0015] 1. The lower box and the upper box are both formed in one piece by 3D printing, without mold opening, reducing the development cycle. The upper and lower cores are combined with the lower and upper boxes, and a coreless process structure is adopted to avoid the traditional method of separate manufacturing of the core and the box and then installing them, which not only makes the equipment installation and disassembly steps complicated, but also leads to the accumulation of tolerances, thus affecting the processing accuracy of the castings.

[0016] 2. The shapes and sizes of the upper core and the lower groove are designed and matched accordingly according to the requirements of use. In addition, an upper groove is provided in the upper box, and a lower groove is provided in the lower box. The concave of the upper and lower grooves are better matched with the raised structure to achieve a better shape design. The lower box adopts a parting process to ensure a beautiful overall appearance and good product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings.

[0018] Figure 1 This is an explosion structure of a 3D printing coreless process structure of the utility model Figure 1 ;

[0019] Figure 2 This is an explosion structure of a 3D printing coreless process structure of the utility model Figure 2 ;

[0020] Figure 3 This is a structural diagram of a 3D printing coreless process structure of the utility model;

[0021] Figure 4 This is a structural diagram of the lower box in a 3D printing coreless process structure of the utility model.

[0022] Legend:

[0023] 1. Lower box; 2. Upper box; 3. Air vent; 4. Positioning block; 5. Upper groove; 6. Upper core; 7. Lower groove; 8. Lower core. DETAILED DESCRIPTION

[0024] The embodiment of the present application solves the problem of low precision after the development and combination of traditional molds and core bodies in the prior art by providing a 3D printing coreless process structure. The lower box and the upper box are both integrally formed by 3D printing, and mold opening is abandoned to reduce the development cycle. The upper core and the lower core are combined with the lower box and the upper box, and a coreless process structure is adopted to avoid the traditional core and box body being manufactured separately and then installed.

[0025] Example 1

[0026] The technical solution in the embodiment of the present application is to solve the problem of low precision after the above-mentioned traditional mold and core body are developed and combined. The overall idea is as follows:

[0027] like Figure 1-4 As shown, in view of the problems existing in the prior art, the utility model provides a 3D printing coreless process structure, including

[0028] The lower box 1 and the upper box 2 form a casting cavity inside after the lower box 1 and the upper box 2 are installed. A lower core 8 is arranged in the middle of the lower box 1, and an upper core 6 is arranged in the lower part of the upper box 2, wherein the upper core 6 and the lower core 8 are combined to realize the modeling of the casting cavity and realize the subsequent casting.

[0029] The lower box 1 and the upper box 2 are both integrally formed by 3D printing, without mold opening, reducing the development cycle, and are combined with the lower box 1 and the upper box 2 by the upper core 6 and the lower core 8. A coreless process structure is adopted to avoid the traditional method of separately manufacturing the core and the box and then installing them, which not only makes the equipment installation and disassembly steps complicated, but also leads to the accumulation of tolerances, thereby affecting the processing accuracy of the casting.

[0030] The shapes and sizes of the upper core 6 and the lower groove 7 are designed and matched accordingly according to the requirements of use. In addition, an upper groove 5 is provided in the upper box 2, and a lower groove 7 is provided in the lower box 1. The concave of the upper groove 5 and the lower groove 7 are better matched with the raised structure to achieve a better shape design. The lower box 1 adopts a parting process scheme to ensure a beautiful overall appearance and good product quality.

[0031] Three groups of positioning blocks 4 are arranged at the four corners above the lower box 1, and grooves are arranged at the corresponding positions of the upper box 2 for easy positioning. The positioning blocks 4 are used to assemble and dock the lower box 1 and the upper box 2, thereby improving the convenience of installation.

[0032] The upper end of the upper box 2 is provided with an air vent 3, and a valve switch is provided in the air vent 3, so that air flow is dispersed to the casting cavity through 3 to achieve air pressure balance in the cavity.

[0033] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A 3D printing coreless process structure, characterized in that: A lower box (1) and an upper box (2), wherein a casting cavity is formed inside the lower box (1) and the upper box (2) after being installed, a lower core (8) is arranged in the middle of the lower box (1), and an upper core (6) is arranged in the lower part of the upper box (2), and the upper core (6) and the lower core (8) are combined to realize the shaping of the casting cavity, and the lower box (1) and the upper box (2) are both integrally formed by 3D printing, and are combined with the upper core (6) and the lower core (8) with the lower box (1) and the upper box (2), and a coreless process structure is adopted.

2. A 3D printing coreless process structure as claimed in claim 1, characterized in that: The shapes and sizes of the upper core (6) and the lower groove (7) are designed and matched accordingly according to the requirements of use. In addition, an upper groove (5) is provided in the upper box (2), and a lower groove (7) is provided in the lower box (1). The concave portions of the upper groove (5) and the lower groove (7) are better matched with the raised structure.

3. A 3D printing coreless process structure as claimed in claim 1, characterized in that: Three groups of positioning blocks (4) are arranged at the four upper corners of the lower box (1), and corresponding grooves are arranged at the positions of the upper box (2).

4. A 3D printing coreless process structure as claimed in claim 1, characterized in that: The upper end of the upper box (2) is provided with an air vent (3), and a valve switch is provided in the air vent (3).

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