Mastars

Location: Home » Resources » FAQ
Related news
How to cool down the injection molding machine under extreme high temperature?
How to cool down the injection molding machine under extreme high temperature?
Mastars provides rapid prototyping services, injection mold design services, and also has injection molding machines of ...
Mastars|What Parts Can CNC Turning Make|CNC machining prototyping
Mastars|What Parts Can CNC Turning Make|CNC machining prototyping
Mastars CNC should be more and more widely used in today's industrial manufacturing services. Mastars has the world's a...
Mastars: All You Ever Wished to Know About Aluminum Extrusion
Mastars: All You Ever Wished to Know About Aluminum Extrusion
Aluminum extrusion is solid and semi-hollow designs made from aluminum. Since aluminum is a great conductor of heat, it ...
Injection molding of processing method of TPE material|rapid prototyping service
Injection molding of processing method of TPE material|rapid prototyping service
TPE material is a kind of TPE material with superior processing performance, no vulcanization, recyclability and low cos...
The difference between appearance prototype and structure prototype|mastars
The difference between appearance prototype and structure prototype|mastars
Mastars' rapid prototyping service can provide various prototyping services according to customers' needs, verify your d...
Detailed explanation of difficulties in medical plastic injection molding (I)
Detailed explanation of difficulties in medical plastic injection molding (I)
Injection molding in the medical industry is also a branch of the whole injection molding field. After years of developm...
Future development direction of flame retardant plastics-Mastars
Future development direction of flame retardant plastics-Mastars
In recent years, with the rapid development of the automotive industry, the most mature automotive lightweight materials...
Mastars: Full Guide for Selective Laser Sintering
Mastars: Full Guide for Selective Laser Sintering
SLS involves sintering minute pieces of polymer material into a rigid mass depending on a 3D design using a high-powered...
Mastars|2022 Full Guide for Metal Parts Manufacturing
Mastars|2022 Full Guide for Metal Parts Manufacturing
Metal fabrication is the process of fabricating metal by twisting and assembling the pieces. Sprinkler pivots, jet engin...

Contact us

  • Building 6 , Blue Sky Industrial Park, Ditang Road, Shajing Town, Shenzhen City,Guangdong, China (518104)
  • marketing@mastars.com

Mastars: What is Reaction Injection Molding and How Does It Works?

Release date:01 , Jan , 0001 Source:Mastars Pageviews:-
At the 1967 International Plastic Fair in Dusseldorf, West Germany, reaction injection moulding (RIM) was first shown to the public in the form of an all-plastic vehicle. It’s identical to injection moulding, except it uses thermosetting polymers, which need a coagulation process inside the molds.

Contents

Mastars

vacuum forming

CNC machining

injection molding

prototype manufacturing

Mastars is a prototype company in China. With our own factory, we adopt mature prototyping technologies (rapid CNC machiningrapid sheet metal prototypingvacuum casting prototyping3D printing prototyping etc.), take new concepts or designs and bring them to life.

Reaction injection molding, referred to as rim, is an industrial molding process. An injection molding method with chemical reaction in the molding process. The raw material used in this method is not polymer, but two or more liquid monomers or prepolymers are added to the mixing head in a certain proportion, mixed evenly under pressure, immediately injected into the closed mold, polymerized and solidified in the mold, and shaped into products.

As for the reaction injection molding (RIM) process, its principle is that a and B raw materials produce polyurethane (PU) or other polymers through thermochemical reaction by mixing in the mixing head and mold cavity.

RIM


It is different from the injection molding process as follows:

1. different forming principles

The raw material of injection molding is thermoplastic, which is heated into a molten state through high temperature and cooled and solidified in the mold. It belongs to physical reaction and is reversible; The raw materials of RIM process are thermosetting plastics (such as PU, DCPD, etc.), and the two raw materials are liquid at room temperature without heating and solidified through chemical reaction, which belongs to chemical reaction and irreversible.

2.On the product design structure of molding

1) Injection molding can form parts with complex and precise structure; Rim process is suitable for forming large shell parts with simple structure, and the size requirements are not very strict;

2) In the design of injection molding products, try to consider the uniform wall thickness, and do not be too thick; Rim process is suitable for forming parts with thick wall thickness (more than 6mm) or different wall thickness. It has a large degree of freedom in design and will not produce internal stress and surface shrinkage marks.

3.in terms of output

1) The injection molding process is suitable for mass production and has high efficiency; Rim process is suitable for small batch production (annual demand is about 50-5000), large and small batch parts production and trial production of parts in R & D stage;

2) In the case of small batch, RIM process has less investment and shorter cycle than injection molding process;

4. Due to the characteristics of raw materials, RIM process can form parts with different density, hardness and elasticity, and the inlay function and effect are good


Mastars Industries CO., LTD

www.mastars.com

Email: marketing@mastars.com

Tel: +86 755-88210689

Fax: +86 755-8821 0685

Add: Building 6,Blue Sky Industrial Park, Ditang Road, Shajing Town, Shenzhen City, Guangdong, China


Contents

Mastars

vacuum forming

CNC machining

injection molding

prototype manufacturing