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What are the common production methods of rapid prototyping parts in industrial product design

Jun 04,21

What are the common production methods of Rapid prototyping parts in industrial product design

Rapid prototyping belongs to local trade termsThe technical term for this is: sample validation sample plate ,Equal scale model and so on.The Rapid prototyping is also called the first prototype in different places (Cantonese name). In general, a verification sample that is manufactured in small quantities before the product is finalized


The products just designed can not be perfect, or even can not be used. Once there are defects in direct production, they will all be scrapped, which is a great waste of manpower, material resources and time.



Therefore, usually just research and development or design completed products need to do rapid prototyping, the product needs mold production, usually according to the product appearance drawings or structural drawings to make one or more, used to check the appearance or structure of the rationality of the functional sample.


Rapid prototyping is in the premise of no open mold, to verify the feasibility of the product. rapid prototyping is generally a small number of samples, production cycle is short, the loss of manpower and material resources, quickly find out the shortcomings of the product design and improve, for the product design to provide sufficient basis for mass production.



There are many ways to make the rapid prototyping, and different processes have their own advantages and disadvantages.
1, clay figurine,
With clay hand carved into a three-dimensional product is called clay carving, in the early stage of industrial manufacturing without automation equipment, do hand are carved with clay.



The material used for clay carving is hard clay, and it is generally carried out by manual carving. According to the design concept of the product or the reference design picture, the engraver uses the clay to stack and carve, and finally obtains the clay model of the product appearance.

In order to get a high quality appearance model, the requirements for the beauty and artistic sense of the sculptor are relatively high, so the cost is relatively higher.
2, CNC fine engraving machine processing
CNC engraving machine is a more traditional rapid prototyping production process, good at small tool finishing, with the ability of milling, grinding, drilling and high-speed tapping, is widely used in 3C industry, mold industry, medical industry and many other fields.



Rapid prototyping processing process produced by the CNC fine engraving machine, can be very accurate to reflect the information expressed by the drawings, and the hand surface quality is high, especially after the completion of the surface spraying and screen printing, even more than the mold after the production of the product is brilliant.


CNC processing mode is suitable for materials with high requirements for toughness, large products and high precision products. Suitable materials include plexiglass, resin, wood, metal (including copper, aluminum, hardness less than HRC40 soft steel), etc.


Most CNC equipment for the production of hand board is a 3-axis machine. Some complex structures of the workpiece need to be separated and processed by hand and then stitched together, because the 3-axis machine can only process a single surface.
3, 3D printing molding
3D printing is usually done using digital materials printers. It is often used in mold manufacturing, industrial design and other fields to make models, and then gradually used in the direct manufacturing of some products. There are already parts printed with this technology. The technology has applications in jewelry, footwear, industrial design, architecture, engineering and construction (AEC), automotive, aerospace, dental and medical industries, education, geographic information systems, civil engineering, firearms, and other fields.


There are many different techniques for 3D printing, which differ in the way that the materials are available and the parts are created in different layers of construction.

Commonly used materials for 3D printing include resin, nylon glass fiber, durable nylon material, stainless steel, aluminum material, titanium alloy, silver plating, gold plating, gypsum material, rubber material and so on.
4, vacuum-casting


vacuum-casting process refers to the process of defoaming, mixing, preheating, injection of castables under vacuum conditions, and the secondary curing molding process for 2-3 hours in a thermostat of 60-80.
The imitation products produced by the silica gel compound mold can reach the strength and hardness of raw materials such as ABS. More than 20 of the same products can be made from a single silicone mold. It greatly reduces the cost, cycle time and risk of product development.

The structure is more disorderly, the wall thickness is uniform, and the small batch sample meets certain function and appearance requirements. The opening iron mold has high cost and long cycle, so the vacuum-casting can be selected for production and molding.