阅读说明：本技术 一种类3d打印技术的金属粉末均匀混粉/填充模腔的方法、系统及多腔送料靴 (Method and system for uniformly mixing and filling metal powder into die cavity by 3D-like printing technology and multi-cavity feeding boot ) 是由 钟文镇 陈超 李国平 韩青 于 2020-06-04 设计创作，主要内容包括：本发明属于粉末冶金领域,具体涉及一种类3D打印技术的金属粉末均匀混粉/填充模腔的方法、系统及多腔送料靴。利用多腔送料靴实现粉体分别给料,同时借助模腔的高速运动,将金属粉末逐层填充到模腔中的均匀混粉和填充模腔的方法。该方法的优势在于利用多腔送料靴和模腔的高速运动实现了粉末填充模腔过程,此填充工序替代了传统的混粉和填充两道工序,极大的提高了生产效率,节约了生产成本。(The invention belongs to the field of powder metallurgy, and particularly relates to a method and a system for uniformly mixing and filling metal powder into a die cavity by 3D-like printing technology, and a multi-cavity feeding shoe. The method is characterized in that powder is fed respectively by utilizing a multi-cavity feeding shoe, and metal powder is filled into a die cavity layer by virtue of high-speed movement of the die cavity to uniformly mix powder and fill the die cavity. The method has the advantages that the powder filling process of the die cavity is realized by utilizing the high-speed movement of the multi-cavity feeding shoe and the die cavity, the traditional powder mixing and filling processes are replaced by the filling process, the production efficiency is greatly improved, and the production cost is saved.)

1. A multi-chamber feed shoe, comprising: the material cavities are arranged in series, and the bottom of each material cavity is provided with an opening.

2. A multi-chamber delivery shoe according to claim 1 wherein the chamber is rectangular, funnel-shaped, or arcuate-edged.

3. A multi-chamber delivery shoe according to claim 1 wherein each chamber is filled with a different powder.

4. A system for uniformly mixing/filling a die cavity with metal powder, which is similar to a 3D printing technology, wherein the die cavity is arranged below a workbench, a multi-cavity feeding shoe according to any one of claims 1 to 3 is arranged above the workbench, the die cavity moves along with the workbench, and the multi-cavity feeding shoe is stationary relative to the workbench; and a hole is formed in the position, in contact with the die cavity, of the workbench.

5. The system for uniformly mixing/filling a mold cavity with metal powder for 3D-like printing as claimed in claim 4, wherein a felt is disposed between the multi-chamber feeding shoe and the work table.

6. The system for uniform mixing/filling of metal powder into a mold cavity of 3D-like printing technology as claimed in claim 4, wherein the work bench is of a rotary type or a linear type.

7. A method for uniformly mixing and filling metal powder into a die cavity of a 3D-like printing technology is characterized by comprising the following steps:

filling a multi-chamber shoe according to any of claims 1-3 with powder to be filled;

the multi-cavity feeding boot is kept static, the die cavity moves synchronously along with the workbench, powder is discharged from the bottom of the multi-cavity feeding boot, and the powder is uniformly mixed while the die cavity is filled with the powder.

8. The method for uniformly mixing/filling metal powder into a die cavity of 3D-like printing technology according to claim 7, wherein the moving speed determines the thickness of the powder layer filled into the die cavity;

or 4-6 material cavities are formed.

9. The method for uniformly mixing/filling a die cavity with metal powder of 3D-like printing technology according to claim 7, wherein the powder comprises: powder, metal powder, ceramic powder, cement, composite material or plasticizer.

10. The method for uniformly mixing/filling a die cavity with metal powder for 3D-like printing as claimed in claim 7, wherein the multi-chamber shoe is made of metal.

Technical Field

The invention belongs to the field of powder metallurgy, and particularly relates to a method for uniformly mixing metal powder/filling a die cavity by using 3D-like printing technology.

Background

The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.

The technological process of producing the product by the powder metallurgy technology comprises the steps of mixing powder, filling a die cavity, pressing, degreasing, sintering, finishing and the like, wherein the nonuniformity of the mixed powder and the segregation phenomenon during the filling of the die cavity are the technical problems of the powder metallurgy technology, and the nonuniformity in the stages of mixing the powder and filling the die cavity is inevitably transferred to the working procedures of pressing, sintering and the like, so that the quality of the powder metallurgy product is finally influenced.

Disclosure of Invention

In order to solve the problems of non-uniformity of mixed powder and segregation phenomenon of a filling die cavity, the invention provides a method for uniformly mixing powder and filling the die cavity, which realizes that powder is respectively fed by using a multi-cavity feeding shoe, and simultaneously, metal powder is filled into the die cavity layer by virtue of high-speed movement of the die cavity. The method has the advantages that the powder filling process is realized by utilizing the high-speed movement of the multi-cavity feeding shoe and the die cavity, the traditional powder mixing and die filling procedures are replaced by the filling procedure, the production efficiency is greatly improved, and the production cost is saved.

In order to achieve the technical purpose, the invention adopts the following technical scheme:

in a first aspect of the invention, there is provided a multi-chamber delivery shoe comprising: the material cavities are arranged in series, and the bottom of each material cavity is provided with an opening.

The multi-chamber shoe of the invention is always stationary, the mould cavity is fixed to a rotatable or linearly movable table and moves at high speed with the table, the speed of movement determines the thickness of the powder bed filled into the mould cavity, obviously the faster the movement the thinner the bed.

In a second aspect of the present invention, there is provided a system for uniformly mixing/filling metal powder into a mold cavity, which is similar to 3D printing technology, wherein the mold cavity is disposed below a workbench, any one of the above multi-cavity feeding shoes is disposed above the workbench, the mold cavity moves along with the workbench, and the multi-cavity feeding shoe is stationary relative to the workbench. And a hole is formed in the position, in contact with the die cavity, of the workbench.

By controlling the length of each material cavity of the multi-cavity feeding shoe, the workbench is driven to drive the die cavity to move at a high speed, so that the thickness delta can infinitely approach zero, and uniform powder mixing is realized while the die cavity is filled with powder. The thickness is the thickness of the powder filled into the die cavity per cavity of the feed shoe, and depends on the length of the cavity, the speed of movement of the die cavity and the flow characteristics of the powder itself.

In a third aspect of the present invention, there is provided a method for uniformly mixing/filling a die cavity with metal powder of 3D-like printing technology, comprising:

filling powder to be filled into the multi-cavity feeding shoe;

the multi-cavity feeding shoe keeps static, the die cavity moves along with the workbench, powder is discharged from the bottom of the multi-cavity feeding shoe, and the powder is uniformly mixed while the die cavity is filled with the powder.

The invention realizes the respective feeding of the powder by using the multi-cavity feeding shoe, and simultaneously fills the metal powder into the uniform powder mixing and filling die cavity layer by means of the high-speed movement of the die cavity. The method has the advantages that the powder filling process of the die cavity is realized by utilizing the high-speed movement of the multi-cavity feeding shoe and the die cavity, the traditional powder mixing and filling processes are replaced by the filling process, the production efficiency is greatly improved, and the production cost is saved.

The invention has the beneficial effects that:

(1) the invention realizes the respective feeding of the powder by using the multi-cavity feeding shoe, and simultaneously fills the metal powder into the uniform powder mixing and filling die cavity layer by means of the high-speed movement of the die cavity. The method has the advantages that the powder filling process of the die cavity is realized by utilizing the high-speed movement of the multi-cavity feeding shoe and the die cavity, the traditional powder mixing and filling processes are replaced by the filling process, the production efficiency is greatly improved, and the production cost is saved.

(2) The device has the advantages of simple structure, convenient operation, low cost, strong practicability and easy popularization.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.

FIG. 1 is a multi-chamber transfer shoe/mold cavity mold of example 1; wherein, 1 is a multi-cavity feeding shoe, 2 is a die cavity 3 and is a rotating table;

FIG. 2 is an expanded schematic view of a multi-chamber shoe layer-spread powder mixing/filling mold cavity of example 1; wherein, 1 is a multi-cavity feeding boot in an expansion form; 2 is a die cavity; 4 is an arrow indicating the direction of movement of the mold cavity;

FIG. 3 is a schematic view of the cavity-filling material layer in example 1, where Δ ∈ 0, uniform mixing was achieved.

Detailed Description

It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

A method for uniformly mixing and filling a die cavity is provided, wherein a multi-cavity feeding shoe is used for respectively feeding powder, and metal powder is filled into the die cavity layer by virtue of high-speed movement of the die cavity.

A multi-chamber feed shoe comprising: the material cavities are arranged in series and do not have bottom plates.

The specific shape of the material cavity is not particularly limited in this application, and in some embodiments, the material cavity is arc-shaped, rectangular or funnel-shaped to meet the discharge requirements of different speeds.

In some embodiments, the charge cavities are filled with different powders.

The invention also provides a system for uniformly mixing and filling the metal powder into the die cavity, which is similar to the 3D printing technology, wherein the die cavity is arranged below the workbench, any multi-cavity feeding shoe is arranged above the die cavity, the die cavity moves along with the workbench, and the multi-cavity feeding shoe is static relative to the workbench.

And a hole is formed in the position, corresponding to the die cavity, of the workbench, so that powder of the multi-cavity feeding shoe falls into the die cavity.

The specific movement mode of the worktable is not particularly limited in the application, and the worktable can be in rotary motion or linear motion. The rotary worktable feeding shoe generally has a radian, and the linear feeding shoe generally has a rectangular structure or a funnel structure. The table, whether rotating or linear, can be moved with the shoe or with the mould cavity. The purpose is to realize the relative motion of the feeding shoe and the die cavity, thereby realizing feeding.

In some embodiments, the table moves linearly to cause the mold cavity to move synchronously with the table for feeding and discharging.

The invention also provides a method for uniformly mixing and filling the metal powder into the die cavity, which is similar to the 3D printing technology, and comprises the following steps:

filling powder to be filled into any of the multi-cavity feeding shoes;

the multi-cavity feeding shoe keeps static, the die cavity moves along with the workbench, and powder is uniformly mixed while the powder is filled in the die cavity.

In some embodiments, a felt is arranged between the multi-cavity feeding shoe and the workbench to ensure that the bottom of the multi-cavity feeding shoe is tightly attached to the workbench, so that external air flow interference is reduced, the airtightness is improved, and meanwhile, the friction force between the multi-cavity feeding shoe and the workbench is increased.

In some embodiments, the material cavity can be selected according to specific situations, and the length directly determines the proportion of the powder.

In some embodiments, the rotation speed of the worktable is selected according to different powders, and the rotation speed range is different due to different flow characteristics of the powders, so that the rotation speed of the powder is slow, and the rotation speed of the metal powder is much faster.

In some embodiments, the workbench is a disc, and is simple in structure and convenient to install and use.

The number of the bins is determined by the type of the actual powder, and the length of the bins can be adjusted. In some embodiments, the number of the material cavities is 4-6.

The type of powder is not particularly limited, and thus, in some embodiments, the powder is powder and metal powder, and may also include ceramic powder, cement, composite materials, plasticizers, etc., which may be uniformly mixed and filled with the system of the present application.

The material of the multi-cavity feeding shoe is not particularly limited in this application, and therefore, in some embodiments, the material of the multi-cavity feeding shoe is a metal material, which is convenient to manufacture and has a stable structure.

Fig. 1 is developed to obtain a schematic diagram of fig. 2, and it can be seen from fig. 2 that the multi-cavity feeding shoe is always stationary, the die cavity is fixed on the worktable and moves with the worktable at a high speed, the moving speed determines the thickness of the powder material layer filled in the die cavity, and obviously, the faster the movement, the thinner the material layer.

Fig. 3 shows the layer thickness Δ, which is the thickness of the powder filled into the die cavity per feeding chamber of the feeding shoe, and which depends on the length of the feeding chamber, the speed of movement of the die cavity and the flow characteristics of the powder itself. By controlling the length of each material cavity of the multi-cavity feeding shoe, the workbench is driven to drive the die cavity to move at a high speed, so that the thickness delta can infinitely approach zero, and uniform powder mixing is realized while the die cavity is filled with powder.

The present invention is described in further detail below with reference to specific examples, which are intended to be illustrative of the invention and not limiting.