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Talking about 3D printing consumables—ABS material introduction

2021-05-12 3DHey New Material Technology Co., Ltd. 0

  (ABS is the acronym for Acrylonitrile Butadiene Styrene, which refers to acrylonitrile-butadiene-styrene copolymer)It is a kind of thermoplastic polymer structure material with high strength, good toughness and easy processing and forming, also known as ABS material.

  As an amorphous plastic, ABS material has a higher glass transition temperature, and the heated form gradually becomes fluid from outside to inside, which means that ABS can withstand higher temperatures before completely losing its physical strength. ABS is also an option for 3D printing materials.

 

ABS材料

 

  

advantage:

   Lower cost, good strength and wear resistance, and better heat resistance.

  shortcoming:

   Severe deformation after cooling, requiring heating bed or heating chamber, pungent odor in printing, and poor molding accuracy.

   When choosing ABS materials as 3D printing consumables, you need to pay attention to the following points:

  

 

1. Control warpage

   The most common problem of printing ABS is warpage. When the ABS wire is extruded, the temperature is at least 220 degrees, and then it will be cooled to the ambient temperature immediately. This large temperature change will cause the material to shrink. The result is that ① the first layer of wire is separated from the platform, which is often the case of warping, ② the model will shrink and deform, such as the long side bends inward.

   In order to reduce the warpage as much as possible, it is necessary to set a higher temperature hot bed and heat it to 110ºC to improve the warpage.

   At the same time, in the JGcreat slicing software, you can turn on the function of printing the starting layer of temperature, so that the nozzle and the platform have a higher temperature when the starting layer is printed.

   When printing larger parts, in order to reduce shrinkage, reduce the wall thickness and filling within the feasible range, that is, reduce the overall amount of model material to reduce the degree of shrinkage deformation. You can consider using the windshield function, local temperature temperature, to prevent excessive cooling and large temperature changes caused by ambient airflow during the printing process.

  

   2. Use eaves or underlay

   Even if the model is successfully printed on the platform, due to the comprehensive stress problem, the corners of the model are still prone to warping and cleaning, especially the model with a larger bottom surface. In order to reduce the occurrence of these situations, it is necessary to use eaves or bottom pads to increase the area of ​​adhesion to the platform.

  Of course, we need to pay attention to that the bottom pad will increase a lot of printing time. You can reduce the printing time by modifying the thickness of the bottom pad and bottom density. The edge of the eaves is relatively thin, which may cause the sharp edges and corners of the model to tear and warp the edge of the eaves. In this case, thicken the edge of the eaves or create a round flat extension for the bottom acute corner in the modeling.

  

  3. Ensure that the environment is suitable

   In order to reduce the impact of ambient temperature and airflow on ABS printing, it is necessary to provide a stable environment for the printer as much as possible.

  A closed case and a constant heat device are a good choice. At the same time, since the use of ABS for printing will produce strong odors, long-term inhalation is harmful to the human body, and air circulation or air filtration needs to be done, such as installing an air filtration system and exhausting smoke outdoors.

Shenzhen Weiwei New Material Technology Co., Ltd. is an innovative company focusing on the development and production of 3D printing materials. The company was established in November 2020. Relying on the brother company’s nearly 20 years of experience in R&D and production of plastic raw material solutions, it responds to the country’s “strategic "Emerging Industries" is called for research on biodegradable materials such as PCL and PLA. The company has developed technical cooperation with Bayer Group and South China University of Technology, established a research and development center in Shenzhen, and jointly developed 3D printing consumables and other high-tech materials.

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