Reaction Injection Molding RIM Housing Parts Big Size Rapid
Prototype To Production Cheap Price
Reaction Injection Molding (RIM) is an innovative manufacturing process used to produce the large
and complex plastic parts with high flexibility, strength and
durability. RIM involves the mixing of liquid bi-component
polyurethanes in a mixer at certain amount ratio, then injecting
the liquid mixture at room temperature and low pressure into mold
cavity where the mixture reacts and cures into a solid part.
Advantages of RIM Parts:
Thick and Various wall thickness for one part
Excellent mechanical properties
High flexibility, strength and durability
Good chemical resistance
Great impact resistance
Excellent dimensional stability
This was an Engine Casing that was originally manufactured by the
sheet metal fabrication with lots of welding. To save cost,
customer modified the design of this casing to be Reaction
Injection Molded. The different wall thicknesses of 5/7/10/20 mm
brought challenge to shrinkage control.
The high pressures used cause the plastic to conform to the mold’s
shape, thereby generating the part. Like metal die casting, custom
plastic injection molding typically produces components that
require little or no additional work. Reaction Injection Molding
(RIM) is a specialized subset of the injection molding technique
that chemically bonds two or more plastics into a polymer before
they are introduced into the mold.
Our RIM tooling was usually made of Epoxy Resin & Silicone Rubber,
the silicone rubber pieces were usually replaced after 100 shots. Low-Pressure & Room-Temperature Injection Molding required fairly
low mold locking force, thus the simple clamps were fine for our
RIM process.
RIM Parts Design Considerations:
When designing parts for RIM production, it's important to consider
factors such as size, structure, wall thickness, draft angles, and
gating. RIM parts can be designed with complex geometries and
intricate details, but it's important to ensure that the part
design is manufacturable and the tooling favors the design.
One shot of injection molding time was around 40 seconds. More big
size and volume of the part, More time of the reaction injection
molding. Insert Molding and Overmolding were also feasible for our RIM
process. 4 stainless steel M6 nuts were inserted for injection
molding.
We are respected in RIM industry in China, the RIM service we send
out to global market are quick, economical and quality that are
proven by the customers used our service, especially from
automobile field. We look forward to doing more and better by our
continuously improving RIM expertise and experience.
Industry Applications:
RIM is commonly used in the low volume manufacturing or prototyping
of automotive, aerospace, medical devices, and consumer goods
parts. Such as automotive bumpers & grills, body panels, interior
components, aerospace ducting, large enclosures, big housings and
medical covering shells.
We are a professional supplier. We know what we are doing. We keep a very stable quality level for
years. Thanks to our professional production and technical team, our qualified products rate is 99.75% and we are constantly improving it, we hope our clients can get what they paid for.
Due to the low injection molding temperatures and pressures, RIM is
well-suited for molding large parts with variable wall thickness
and smooth surface finishes. We can also benefit from its
relatively high turnover rate, which makes it proficient in
handling low to middle volume production projects. In addition, RIM
parts have high tensile strength, heat resistance, and good
resistance to corrosive acids or solvents. However, prolonged
exposure to sunlight can degrade polymer-based parts.
How does HONKIA compare to other suppliers on price?
Compared to other Chinese suppliers, we choose not to compete on price but to offer
the high level of quality, rapid response, and professional results. That’s why some customers cooperate with us for many years, compared with the price, they need a reliable partner to avoid
serious losses caused by annoying after-sales service or even the trouble of finding no one.
What if I am not completely satisfied with the parts I receive?
HONKIA will free remake or amend the returned parts that you are not
completely satisfied, or refund the full arrived payment, though
this is rarely happened in the past. Any disputes based on a subjective or unilateral determination shall be discussed and negotiated to reach a reasonable result. Our continuing business relies on earning your confidence in our
ability to meet and exceed the reasonable expectations.
