Build material recovery for three-dimensional (3D) printers
阅读说明:本技术 用于三维(3d)打印机的构建材料回收 (Build material recovery for three-dimensional (3D) printers ) 是由 韦斯利·R·沙尔克 贾丝廷·M·罗曼 兰德尔·韦斯特 罗伯特·劳伦斯·温比尔纳 于 2017-07-20 设计创作,主要内容包括:用于三维(3D)打印机的构建材料回收系统可以包括:选择性固化装置,用于使用构建材料创建3D物体;构建处理装置,用于将3D物体从未熔合的构建材料中分离;材料分离与调节装置,用于调节未熔合的构建材料;以及材料存储装置,用于存储所调节的构建材料。(A build material recovery system for a three-dimensional (3D) printer may include: a selective solidification device to create a 3D object using build material; build processing means for separating the 3D object from unfused build material; a material separation and conditioning device for conditioning unfused build material; and a material storage device for storing the conditioned build material.)
1. A build material recovery system for a three-dimensional (3D) printer, comprising:
a selective solidification device to create a 3D object using build material;
build processing means for separating the 3D object from unfused build material;
a material separation and conditioning device for conditioning the unfused build material; and
a material storage device for storing the conditioned build material.
2. The system of claim 1, further comprising the build processing apparatus to:
separating the 3D object from unfused build material using a gas flow to extract the unfused build material from the selective solidification module; and
transporting the unfused build material to the material separation and conditioning device.
3. The system of claim 1, further comprising the build processing apparatus to:
separating the 3D object from unfused build material using vibration to extract the unfused build material from the selective solidification module; and
transporting the unfused build material to the material separation and conditioning device.
4. The system of claim 1, further comprising the material separation and conditioning device to:
separating the unfused build material from air;
removing particles whose size exceeds a threshold; and
conditioning the unfused build material prior to delivery to the material storage device or a selective solidification device.
5. The system of claim 1, further comprising the material separation and conditioning device to:
separating the unfused build material from air;
removing contaminants from the unfused build material; and
conditioning the unfused build material prior to delivery to the material storage device or a selective solidification device.
6. The system of claim 1, further comprising the material separation and conditioning device to condition the unfused build material using at least one of cooling, deionizing, deagglomerating, humidifying, and drying the unfused build material.
7. The system of claim 1, further comprising a transfer device to transfer the conditioned build material from the material storage device to the selective solidification device for a different 3D object.
8. A method of build material recycling for a three-dimensional (3D) printer, comprising:
selectively curing the 3D object using the build material;
separating the 3D object from unfused build material;
preparing the unfused build material comprising, repeatedly:
conditioning the unfused build material;
classifying the unfused build material; and
removing contaminants from the unfused build material; and
in response to reaching the threshold preparation state, the prepared build material is transferred to a material storage device.
9. The method of claim 8, further comprising transporting the prepared build material from the material storage device for selective curing of different 3D objects.
10. The method of claim 9, further comprising mixing the prepared build material with fresh build material during transport.
11. The method of claim 8, further comprising:
collecting waste material after sorting and removing contaminants from the unfused build material.
12. The method of claim 8, further comprising transferring the conditioned build material from the material storage device to the selective solidification device for use in the 3D object.
13. A build material recovery system for a three-dimensional (3D) printer, comprising:
a selective solidification device to create a 3D object using build material;
build processing means for separating the 3D object from unfused build material;
a material separation and conditioning device for:
conditioning the unfused build material;
removing contaminants from the unfused build material; and
removing build material having a size that exceeds a threshold value from the unfused build material; and
a transmission device for:
transferring the separated and conditioned build material to a material storage device for storage;
mixing the conditioned build material with fresh build material in a specific ratio; and
delivering the mixed conditioned build material and fresh build material to the selective solidification device to create different 3D objects.
14. The system of claim 13, further comprising a 3D object recovery zone for 3D object recovery after separation of unfused material.
15. The system of claim 13, wherein the system is integrated within the 3D printer.
Background
Three-dimensional (3D) printers can be used to create different 3D objects. The 3D printer may utilize additive manufacturing techniques to create the 3D object. For example, the 3D printer may deposit material in successive layers in a selective curing device of the 3D printer to create the 3D object. The material may be selectively fused or otherwise cured to form a continuous layer of the 3D object.
Drawings
Fig. 1 illustrates an example of a method of build material recycling for a 3D printer consistent with the present disclosure.
Fig. 2 illustrates an example of a build material recovery system for a 3D printer consistent with the present disclosure.
Fig. 3 illustrates another example of a method of build material recycling for a 3D printer consistent with the present disclosure.
Detailed Description
Some 3D printers may utilize build material to create 3D objects. The build material may be in powder and/or granular form. The 3D printer may apply build material in successive layers in a selective curing device to create a 3D object. The build material may be selectively fused or cured, and the next successive layer of build material may be applied to the selective curing device.
As used herein, the term "3D printer" may refer, for example, to a device that may create a physical 3D object during a build process of the 3D printer, in some examples, the 3D printer may utilize a 3D digital model to create the 3D object. The 3D printer may create the 3D object by depositing build material, such as powder, and binder material or fusing agent, for example, in a selective curing device of the 3D printer. As used herein, the term "selective curing device" may, for example, refer to an area of a 3D printer in which a 3D object may be created. For example, the build material may be selectively cured within the build chamber by a selective curing device. The build chamber may be an area in which the 3D object is formed. Build material may be deposited in successive layers in a selective solidification device to create a 3D object. In some examples, the 3D printer may utilize powder bed fusion and other types of 3D printing to create the 3D object. For example, "selective curing" may refer to different types of 3D printing (and curing of 3D objects, such as, for example, selective heat sintering, selective laser sintering, adhesive jet curing, stereolithography, digital light processing, heat fusing and fusing agents, selective laser melting, electron beam melting, or laminate object manufacturing, among others.
In some examples, not all of the build material supplied to the selective solidification device of the 3D printer may be utilized during the build process of the 3D object in the 3D printer. For example, the build material supplied to the selective solidification device may form part of the 3D object or may be used during a 3D printing process without being solidified. For example, occasional build material may be air-borne and/or may fall outside the area of the build platform during the build process, and/or excess build material may be left behind at the end of the build process. When recovered from the selective solidification apparatus, incidental and/or excess build material may be reused during the same build process and/or in subsequent build processes. As used herein, incidental and/or excess build material may be referred to as "unfused or uncured build material.
Some methods of recovering unfused build material include removing containers (e.g., "build units") containing 3D objects, and manually removing unfused build material. For example, a user may manually screen build and unfused build material to remove 3D objects from the unfused build material. Unfused build material may be manually placed elsewhere for future build use or disposal.
Build material recycling according to the present disclosure may include a build material recycling system for a 3D printer integrated within the 3D printer. For example, some examples may include recycling unfused build material during and/or after a build process, recycling the recycled build material, and providing the recycled build material to a selective solidification device of a 3D printer for use in an ongoing or subsequent build process. The building material recovery system can recycle and condition the unfused build material for use in the build process or store it for future use.
Such examples may reduce the amount of lost build material, contaminated build material (e.g., contaminated with bugs, hair, other build material, etc.), and human contact with build material. Further, examples that include conditioning the build material may result in an improved condition of the recycled build material, resulting in an improved 3D object.
Fig. 1 illustrates an example of a
As used herein, recycled build material includes build material recovered from a previous or current selective solidification process, and fresh build material includes new build material that is not a result of the recovery and/or recycling. Selective curing may include using mixed recycled and fresh build material, using only fresh build material, or using only recycled build material. For example, a particular blend ratio may be required for a particular 3D object. Example mixing ratios may include, but are not limited to: 100% fresh, 0% recycle; 20% fresh, 80% recycled; and 0% fresh, 100% recycle.
At 106, the 3D object may be created using selective curing, such as, for example, selective heat sintering, selective laser sintering, adhesive jet curing, stereolithography, digital light processing, hot melt/fused deposition modeling, selective laser melting, electron beam melting, laminate object manufacturing, and the like.
At 108, unfused build material may be extracted from the selective solidification device. For example, unfused build material may be separated from the 3D object by a build processing apparatus. In some examples, the build processing apparatus may separate the 3D object from the unfused build material using air flow and/or vibration to extract the unfused build material from the selective solidification module. For example, the gas flow and/or vibration may last for a period of time throughout the extraction process.
In some examples, the separating may include a situation where little air passes through the selective solidification device and/or the holes at the bottom of the 3D printed object recycling area. For example, the apertures may allow unfused build material to flow from the selective solidification device and/or the 3D printed object recovery zone, but the airflow may not pass until separation is complete. With respect to vibration, the vibration causes unfused build material to move around, causing it to enter the hole and be pulled back through the transport device. The unfused build material may be transferred to a material separation and conditioning device.
The 3D object may be recovered at 110. For example, a 3D object (which may also be referred to as a printed object) may be retrieved from a 3D printed object recovery zone. The 3D printed object recycling area may include a container that holds the 3D object. It may have a lid for the user to lift to access the 3D object, and in some examples, the 3D printed object recovery area may include task lighting and tools for cleaning the 3D object. In some cases, the 3D printed object recycling area may include a platform that automatically raises to present the 3D printed object. In some examples, the 3D printed object recovery zone may include an air flow or vacuum source to collect unfused build material.
At 112, unfused build material may be separated from air using a material separation and conditioning device. In some examples, the separation may include cyclonic separation or blow/settling tank separation, or the like. For example, for a portion of the material cycle, unfused build material may be transported in an air stream. In such examples, unfused build material from the selective solidification device and/or the 3D printed object recovery zone may be conveyed pneumatically. To recover the unfused build material, the air/build material mixture may be separated.
After separation, waste may be collected at 114. In some examples, particles may remain in the air stream. In such examples, a filter may be used to achieve the desired separation (e.g., complete separation). Those removed particles may be waste that is trapped in the filter and, therefore, eventually do not enter the recycled build material. For example, a screen, which may include a screen, may process the recycled build material. What remains on the screen is waste, while what passes through can be used as recycled building material. For example, examples of waste left on the screen may include impurities such as fibers or hair.
The material separation and conditioning device may condition unfused build material at 116, 118, and/or 124. Unfused build material can be adjusted to improve the condition of the unfused build material and increase efficiency in subsequent or the same build processes. Conditioning types 1, 2, and 3 may be the same or different conditioning types, and may include, for example, cooling the build material, de-ionizing the build material, and adding or removing humidity from the build material, among others. The adjustment may result in desired properties of the unfused build material, such as a desired size, shape, consistency, and/or a neutral state (e.g., without static electricity). In some examples, these properties may be specified for a particular 3D object.
At 120, the material separation and conditioning device may sort and/or remove contaminants from the unfused build material. Classification may include, for example, removing particles within a particular size of unfused build material. In other words, particles in unfused build material that exceed a threshold (e.g., too large or too small) may be removed. Particles that exceed the threshold may be undesirable, such that they may result in a defective build if used in a build process. In some examples, a sieve may be used to separate desired particles from undesired particles during classification. In some examples, multiple screens may be used. For example, different screen sizes may be used to separate different particle sizes. At 122, particles that exceed the threshold may be collected and/or removed as waste.
The adjustments at 116, 118, 124 and the sorting and/or contaminant removal at 120 may occur in different orders, and in some examples may not occur in the order shown in fig. 1. Although three types of conditioning and one type of classification and contaminant removal are shown in fig. 1, more or fewer types of conditioning, classification, and/or contaminant removal may be utilized. The combination of adjustments, classification, and/or contaminant removal may be determined based on which combination results in the most efficient build process (e.g., desired state, size, texture, etc. of the build material).
At 126, after conditioning and/or contaminant removal, the unfused build material may be transferred to a material storage device for storage of the unfused build material. The material storage means may comprise, for example, a container or hopper or material box to feed the selective curing means for the 3D object.
Fig. 2 illustrates an example of a build
Carriage 256-1 may drop build material (e.g., material supplied from
In some examples, the selective curing device may be enclosed during the selective curing process, and a gas flow or vacuum source may be present. In such examples, unfused (e.g., airborne) build material may be collected by an air flow or vacuum source for use in a current selective curing process and/or a future selective curing process.
The
The user may collect the 3D object from the 3D printed
After the 3D object is created,
Material separation and
Material storage 254 may store the conditioned build material. A doser at the bottom of each of build
The term "pneumatic" may for example refer to the use of a gas that can be pressurized to work precisely on a body. For example, pressurized gas may be used to move build material from one location to another location in a 3D printer. The pressurized gas may be used to move build material in a conduit included in the 3D printer. The conduit may be part of a build
In some examples,
In some examples,
The
Fig. 3 illustrates another example of a
At 362, the
At 366, the
At 374, the
As used herein, "logic" is an alternative or additional processing resource that performs the particular actions and/or elements described herein. Logic may comprise hardware. The hardware may include processing resources such as circuitry that is distinct from machine-readable instructions on a machine-readable medium. Further, as used herein, "a" thing may refer to one or more of such things. For example, "widget" may refer to one widget or a plurality of widgets.
The figures follow a numbering convention in which the first digit or digits correspond to the drawing figure number and the remaining digits identify an element or component in the drawing. Similar elements or components between different figures may be identified by the use of similar digits. For example, 102 may reference element "02" in FIG. 1, and similar elements may reference element 202 in FIG. 2.
The above specification, examples and data provide a description of the method and use of the method and system of the present disclosure. Since many examples can be made without departing from the spirit and scope of the systems and methods of the present disclosure, this specification sets forth only some of the many possible example configurations and implementations.
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