After the 3D printed prototype is made, the surface often has grain and is very rough. However, the first part of the 3D printed prototype is made by laser rapid prototyping. After being polished and polished, it is used as the model part of the mold. Then how should the prototype factory polish and polish the 3D printed prototype model?

First, let’s look at the difference between 3D printing and CNC prototype: the utilization rate of 3D printing prototype is very high; In terms of technology, 3D printing is much better than traditional CNC in terms of complexity. The 3D printing manual can be formed in one time, while the CNC needs many times. 3D printing comes in a variety of colors and plastics.

CNC, as a relatively complex process, requires professional programmers, and professional operators and fixture design, at least three manpower, the relative cost has increased; The 3D printing prototype is equipped with drive software to quickly calculate the printing time and required materials, no professional training, high precision, no processing errors.


To sum up, there are always differences in the verification products of traditional handboards, while 3D printers can directly print the real products. In order to produce products satisfactory to customers, enterprises should first choose qualified 3D printing manufacturers.


Today, StartPrototype introduces a traditional and simple method: sandpaper polishing. Sandpaper polishing is a cheap and effective method, and has been the most commonly used and widely used technology for the post-polishing of 3D printed prototype.


  1. Prepare a prototype model and sandpaper. The smaller the model number of sandpaper, the rougher the grinding, the deeper the trace left after grinding. The more vice versa, the lighter the mark.


  1. Select small type sandpaper for the first time. Press down with four fingers and the palm of your hand while grinding. Hold the sandpaper between your thumb and rub along the grain.


  1. When polishing corners, be careful and gently. To prevent the object being polished from being deformed.


  1. As the sand particles falling off the sandpaper may cause damage to the model itself, clean it with a small brush until the surface is smooth.


  1. Sandpaper of the smallest size can be changed to a larger size after the first polishing.


When sanding 3D printed prototype models, you can choose to use professional equipment such as hand sanding or sanding belt sanding machine. Sandpaper can cause problems when it is used to polish smaller parts because they are reciprocated by human hands or machinery. But sandpaper grinds down relatively quickly. The average 3D print usually has loops of grain that can be sanded down in as little as 15 minutes. If the parts have the minimum requirements of precision and durability, avoid excessive grinding, to calculate the good grinding size in advance, excessive grinding will make the parts deformed scrap.

About Start Prototyping Start Prototyping mainly supply our rapid prototyping service and plastic injection manufacturing for many 3D print companies in the world. Start Prototyping has been engaged in rapid prototyping about 10 years, helping too many designers to turn their ideas into reality. Most of the conceptual prototype of the design has been successfully put into the market and has achieved good benefits. Among them, the most representative metal prototype machining, plastic prototype machining, CNC aluminum machining, Low-Volume Manufacturing, processing technology including CNC machining, vacuum casting, rapid tooling, 3D printing and so on. We have the standard quality inspection process, which is completely in line with the customer’s industrial design. It’s a great honor to be a partner with you. Contact Info Contact:James Yuan Company:Start Prototyping Add:LongGang Village, LongXi Town, BoLuo County, HuiZhou City,GuangDong Province, China Tel:+86-13352636504 Email:[email protected] Web: