Used Rubber Injection Molding Machines for Sale
See all 85 Injection Molding Machines →
Nothing is listed right now — these are machines we've recently sold. or tell us what you need.
Recently sold
SOLD2001 Desma 968.25
USA
SOLD2000 Desma 968.25
USA
SOLD2000 Desma 968.25
USA
SOLD1999 Desma 968.25
USA
SOLD1996 Desma 968.25
USA
SOLD1994 Desma 968.25
USA
SOLD2002 Engel 430H/300VHRB ELAST Rubber
USA
SOLD1999 Desma 968.25
USA
SOLD2002 Engel 430H/300VHRB ELAST Rubber
USA
SOLD1998 Desma 968.25
USA
SOLD2004 Engel Elast 280/200 US EC100 Tie Barless Rubber Press
USA
Looking for Something Specific?
Most of our inventory sells before we can list it online. If you need a specific brand, model, or specification, tell us what you need—we have access to unlisted equipment and machines coming in from plant closures.
Browse Used Rubber Injection Molding Machines by Brand
Looking to Sell Your Rubber Injection Molding Machines?
Meadoworks is an active cash buyer of used industrial equipment. Get a free valuation from our AMEA-certified appraisers.
About Used Rubber Injection Molding Machines
Rubber injection molding machines (also known as rubber injection moulding machines) are specialized for processing elastomeric materials including natural rubber, EPDM, nitrile, neoprene, and other thermoset rubber compounds. Unlike plastic injection molding, rubber injection molding uses heat to cure (vulcanize) the material rather than cool it, requiring different screw designs, barrel configurations, and temperature control systems.
Used rubber injection machines feature cold-runner or cold-pot systems to prevent premature curing, specialized feed systems for strip or granulated rubber, and precision temperature control to ensure proper vulcanization. These machines serve the automotive, aerospace, medical, industrial seal, and O-ring markets.
Meadoworks stocks used rubber injection molding equipment from Desma, REP, Engel, LWB Steinl, and Maplan. Whether you need a rubber injection machine for automotive seals, medical components, or industrial gaskets, contact us at 800-323-0307.
How to Choose a Used Rubber Injection Molding Machine
It cures. It does not cool
A rubber press vulcanizes the compound in a heated mold. A thermoplastic press cools the part. The screw, the runner, and the temperature loop are built the other way around: the barrel stays cool enough that the rubber does not scorch, and the mold is hot enough to cure.
A cold runner or a cold pot keeps the compound from curing before it fills. A thermoplastic hot runner on this job will scorch the shot. Natural rubber, EPDM, nitrile, and silicone do not share one temperature.
How the compound is fed
Strip feed and granulated feed are different machines. A strip that will not enter the throat is not a screw problem you fix later. Shot size still has to fill the cavity, and the clamp still has to hold the projected area while the rubber is curing, not while it is freezing.
Ask the last compound. A press that ran silicone is not automatically ready for a filled EPDM.
Rubber Injection Molding Machine Specs to Compare
| Spec | Why it matters |
|---|---|
| Clamp (tons) | Has to hold the mold shut through the cure. Tonnage copied from a thermoplastic part of the same size is the wrong number. |
| Shot (oz or cc) | Must fill the cavity. A screw that is too large for a small shot sits and scorches. |
| Feed | Strip or granulate. Match it to how you buy the compound. |
| Mold heat | The cure is in the mold. Zones that will not hold a setpoint make an under-cured part. |
| Runner | Cold runner or cold pot. A hot runner from a thermoplastic tool does not transfer. |
Clamp (tons)
Has to hold the mold shut through the cure. Tonnage copied from a thermoplastic part of the same size is the wrong number.
Shot (oz or cc)
Must fill the cavity. A screw that is too large for a small shot sits and scorches.
Feed
Strip or granulate. Match it to how you buy the compound.
Mold heat
The cure is in the mold. Zones that will not hold a setpoint make an under-cured part.
Runner
Cold runner or cold pot. A hot runner from a thermoplastic tool does not transfer.
What to Inspect on a Used Rubber Injection Molding Machine
Heat the mold
Every zone has to come up and hold. A dead zone is an under-cured corner.
Keep the barrel cool
The plasticizing side must not cook the compound. Feel for a heater stuck on.
Feed a strip or a granule
Whichever the machine was built for. Watch it enter, not just the hopper.
Cure a shot
If you can. Tear the part. An under-cure and a scorch look different and both fail.
Meadoworks Track Record
11
Sold through Meadoworks
Common models
Desma 968.25, Engel 430H/300VHRB ELAST Rubber
Related Equipment
- Water Temperature Controllers
Hold the mold at a setpoint
More Injection Molding Machines types
Types of Injection Molding
Common Applications
Frequently Asked Questions
What is the difference between rubber and plastic injection molding?
Rubber injection molding processes thermoset elastomers that cure (vulcanize) with heat, while plastic injection molding processes thermoplastics that solidify by cooling. Rubber injection machines use cold runners to prevent premature curing, specialized screw designs for elastomers, and different temperature control approaches. The machines look similar but have significant differences in screws, barrels, and controls.
How much does a used rubber injection molding machine cost?
Used rubber injection molding machine prices range from $25,000-$75,000 for small machines to $100,000-$400,000 for large production rubber injection machines. Desma and REP machines tend to command premium resale values. Contact Meadoworks at 800-323-0307 for current pricing on rubber injection moulding machines.
Related Resources
Need Help Finding the Right Equipment?
Contact our team with your specifications and we'll help you find the right machine.
