Method for manufacturing universal mold by adopting 3D printing technology

Abstract

The method for manufacturing the universal mold through the 3D printing technology comprises the following steps that S1, a three-dimensional model of a base mold is designed, a three-dimensional model file of the base mold is generated in three-dimensional software, the base mold is machined according to the three-dimensional model, and the base mold is a wood mold; s2, designing a detachable and replaceable live material mold three-dimensional model, and generating a live material mold three-dimensional model file; wherein the A surface of the three-dimensional model of the movable material mold is matched with the inner side surface of the three-dimensional model of the matrix mold, and the B surface of the three-dimensional model of the movable material mold is matched with the outer side surface of a corresponding sand core to be manufactured; s3, a live material mold is printed, the live material three-dimensional model files are imported into a 3D printer, and the live material mold is printed out; s4, sand removal and surface resin coating are conducted on the live material mold subjected to 3D printing forming, after sand removal is conducted on the live material mold, resin coating is conducted on the surface of the live material mold, and after standing and hardening, a base body mold and all live material mold finished products are obtained; and S5, combining: according to the size requirement of the to-be-manufactured sand core, combining the matrix mold with the corresponding active material mold to obtain the mold of the to-be-processed sand core. According to the method for manufacturing the universal mold through the 3D printing technology, the problem that universal manufacturing of molds of products with similar structures is difficult to achieve is solved, and the manufacturing cost of traditional molds is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of casting molds, and in particular to a method for manufacturing a universal mold by adopting 3D printing technology. Background Art

[0002] As products are upgraded, their specifications and dimensions will change, but the main structure and shape remain close or similar. Therefore, the structure and shape of the sand core used to cast the product are also similar or approximate, and only the size may change. However, due to such changes in size or specifications, the molds of the sand cores originally used for casting parts cannot be used and new molds need to be made, which increases the cost of mold making. In addition, in the traditional foundry industry, the molds for making sand cores are usually wooden molds, which require workers to manually process, which is time-consuming and has high labor costs. Summary of the invention

[0003] Based on this, it is necessary to provide a method for making universal molds using 3D printing technology to address the problems of poor versatility and high labor costs of molds used to make sand cores in the prior art. The method of making universal molds using 3D printing technology solves the problem that universal production of molds for products with similar structures is difficult to achieve, and reduces the cost of traditional mold production.

[0004] A method for making a universal mold using 3D printing technology, characterized in that the method for making a universal mold comprises the following steps:

[0005] S1: designing a three-dimensional model of a base mold, generating a three-dimensional model file of the base mold in a three-dimensional software, and processing the base mold according to the three-dimensional model, wherein the base mold is a wooden mold;

[0006] S2: Designing a 3D model of a removable live mold and generating a 3D model file of the live mold; wherein the A surface of the 3D model of the live mold matches the inner surface of the 3D model of the base mold, and the B surface of the 3D model of the live mold matches the outer surface of the corresponding sand core to be manufactured;

[0007] S3: Printing live material molds, importing the three-dimensional model files of each live material into a 3D printer, and printing out live material molds;

[0008] S4: Desanding the live mold formed by 3D printing, coating the surface with resin, desanding the live mold, coating the surface with resin, and standing and hardening to obtain the base mold and the finished live molds;

[0009] S5: Combining, according to the size requirements of the sand core to be manufactured, combining the base mold with the corresponding live material mold to obtain the mold of the sand core to be manufactured.

[0010] Furthermore, in the step S2, the three-dimensional model of the live material mold is obtained by subtracting the three-dimensional model of the sand core corresponding to the base mold from the three-dimensional model of the sand core corresponding to the live material mold.

[0011] Furthermore, a three-dimensional surface portion on the surface A of the live material mold is reserved with a matching clearance of at least 1 mm.

[0012] Furthermore, in the step S5, the live mold and the base mold are fixed by means of a clamping connection or a bolt connection.

[0013] Furthermore, a slot for clamping with the base mold or a threaded hole for bolting with the base mold is reserved on the live material mold.

[0014] Furthermore, the base mold can also be formed by 3D printing.

[0015] The present invention provides a method for making a universal mold using 3D printing technology. For the production of sand cores of products with similar structures, a method of combining a base mold and a live material mold is adopted to save the production cost of the mold, so that a wooden mold of a base mold can be matched with live material molds of various sizes. When making sand cores of different sizes, it is only necessary to combine the live material mold corresponding to the current sand core with the base mold. Moreover, both the base mold and the live material mold can be formed by 3D printing technology, replacing the manually processed wooden mold, thereby saving the cost of mold production. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is an assembly diagram of a universal mold made using 3D printing technology in the present invention DETAILED DESCRIPTION

[0017] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0018] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a centered element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a centered element at the same time. The terms "vertical", "horizontal", "left", "right", "top", "bottom", "bottom end", "top end" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0020] The present invention provides a method for making a universal mold using 3D printing technology, and the method for making a universal mold comprises the following steps:

[0021] S1: designing a three-dimensional model of a base mold, generating a three-dimensional model file of the base mold in a three-dimensional software, and processing the base mold according to the three-dimensional model of the base mold, wherein the base mold is a wooden mold;

[0022] S2: Design a 3D model of a removable live mold and generate a 3D model file of the live mold; wherein the A surface of the 3D model of the live mold matches the inner surface of the 3D model of the base mold, and the B surface of the 3D model of the live mold matches the outer surface of the corresponding sand core to be manufactured;

[0023] S3: Printing live material molds, importing the three-dimensional model files of each live material into a 3D printer, and printing out live material molds;

[0024] S4: sand removal, surface coating with resin, sand removal of the live mold and then surface coating with resin, static hardening to obtain the base mold and the finished products of each live mold;

[0025] S5: Combining, according to the size requirements of the sand core to be manufactured, combining the base mold with the corresponding live material mold to obtain the mold of the sand core to be manufactured.

[0026] The present invention provides a method for making a universal mold using 3D printing technology. For the production of sand cores of products with similar structures, a method of combining a base mold and a live material mold is adopted to save the production cost of the mold, so that a wooden mold of a base mold can be matched with live material molds of various sizes. When processing sand cores of different sizes, it is only necessary to combine the live material mold corresponding to the current sand core with the base mold. Moreover, both the base mold and the live material mold can be formed by 3D printing technology, replacing the manually processed wooden mold, thereby saving the cost of mold production.

[0027] The method for making a universal mold using 3D printing technology is described below in conjunction with specific embodiments to further understand the inventive concept of the method for making a universal mold using 3D printing technology.

[0028] In one embodiment, if Figure 1 As shown, a method for making a universal mold using 3D printing technology comprises the following steps:

[0029] S1: Design a three-dimensional model of the base mold 1, generate a three-dimensional model file of the base mold 1 in the three-dimensional software, and process the base mold 1 according to the three-dimensional model, wherein the base mold 1 is a wooden mold. The base mold made of the wooden mold material can be processed by manual or mechanized equipment. Because the base mold needs to be reused many times, the strength requirement is high, so a wooden mold with a long service life is used as the base mold. It should be noted that the base mold is designed according to the structure of the sand core of the maximum size required, and the sand core of the maximum size can be produced through the base mold.

[0030] S2: Designing a three-dimensional model of a removable live mold 2, and generating a three-dimensional model file of the live mold 2; wherein the A surface 21 of the three-dimensional model of the live mold matches the inner surface of the three-dimensional model of the base mold, and the B surface 22 of the three-dimensional model of the live mold matches the outer surface of the corresponding sand core to be processed;

[0031] S3: Printing the live material mold, importing each live material 3D model file into the 3D printer, and printing out the live material mold. Specifically, the live material mold is printed using a binder jet 3D printing device, that is, the sand is first spread through a sand spreader, and then the print head jets ink according to the sliced ​​pattern of the 3D model to print out the mold live material 2;

[0032] S4: Desanding the live mold formed by 3D printing and coating the surface with resin, desanding the live mold and coating the surface with resin, and standing and hardening to obtain the base mold and the finished live molds;

[0033] S5: Combining the mold, according to the size requirements of the sand core to be manufactured, combining the base mold with the corresponding live material mold to obtain the mold 3 of the sand core to be manufactured.

[0034] In another embodiment, the three-dimensional model of the live material mold is obtained by subtracting the three-dimensional model of the sand core corresponding to the base mold from the three-dimensional model of the sand core corresponding to the live material mold. The three-dimensional model of the live material mold can also be obtained by the following method, that is, when designing the A surface 21 of the live material mold three-dimensional model, first design the three-dimensional model of the overall mold corresponding to the sand core of the current live material mold 2, and then subtract the three-dimensional model of the overall mold corresponding to the current sand core from the three-dimensional model of the base mold to obtain the specific three-dimensional model of the A surface 21 of the live material model; when designing the B surface 22 of the live material mold three-dimensional model, it is also necessary to design the three-dimensional model of the sand core corresponding to the current live material mold, and then subtract the three-dimensional model of the A surface 21 of the live material model from the three-dimensional model of the sand core to obtain the specific structure of the B surface 22 of the live material model, and at the same time, the three-dimensional model of the live material model corresponding to the sand core is also obtained.

[0035] In another embodiment, in order to facilitate the assembly of the active mold A surface 21 and the base mold 1, a matching gap of at least 1 mm is reserved for the three-dimensional surface portion of the active mold A surface, and no gap is reserved for the plane portion.

[0036] In another embodiment, in the step S5 , the live mold and the base mold are fixed by means of a clamping connection or a bolt 23 connection.

[0037] In another embodiment, a slot for engaging with the base mold or a threaded hole for bolting with the base mold is reserved on the live mold. Specifically, when designing the three-dimensional model of the live mold, a slot or a threaded hole for engaging with the base mold is reserved in advance.

[0038] In another embodiment, the base mold can also be formed by 3D printing.

[0039] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0040] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A method for making a universal mold using 3D printing technology, characterized in that: The method for making a universal mold comprises the following steps: S1: designing a three-dimensional model of a base mold, generating a three-dimensional model file of the base mold in a three-dimensional software, and processing the base mold according to the three-dimensional model, wherein the base mold is a wooden mold; S2: Design a 3D model of a removable live mold and generate a 3D model file of the live mold; wherein the A surface of the 3D model of the live mold matches the inner surface of the 3D model of the base mold, and the B surface of the 3D model of the live mold matches the outer surface of the corresponding sand core to be manufactured; S3: Printing live material molds, importing the three-dimensional model files of each live material into a 3D printer, and printing out live material molds; S4: Desanding the live mold formed by 3D printing, coating the surface with resin, coating the surface with resin after desanding the live mold, and letting it stand and harden to obtain a live mold product; S5: Combining, according to the size requirements of the sand core to be manufactured, combining the base mold with the corresponding live material mold to obtain the mold of the sand core to be manufactured.

2. The method for making a universal mold using 3D printing technology according to claim 1, characterized in that: In the step S2, the three-dimensional model of the live material mold is obtained by subtracting the three-dimensional model of the sand core corresponding to the base mold from the three-dimensional model of the sand core corresponding to the live material mold.

3. The method for making a universal mold using 3D printing technology according to claim 1, characterized in that: A matching clearance of at least 1 mm is reserved for the three-dimensional surface portion on the surface A of the live material mold.

4. The method for making a universal mold using 3D printing technology according to claim 1, characterized in that: In the step S5, the live mold and the base mold are fixed by means of clamping or bolting.

5. The method for making a universal mold using 3D printing technology according to claim 4, characterized in that: A clamping groove for clamping with the base mold or a threaded hole for bolt connection with the base mold is reserved on the live material mold.

6. The method for making a universal mold using 3D printing technology according to claim 1, characterized in that: The base mold can also be formed by 3D printing.

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