Used Injection Molds for Sale
4 results
2021 Anova 64 Cavity, 38mm Closure Stack Mold
USA
Fostag 72 Cavity PCO 1810 Closure Mold
USA
Fostag 72 Cavity PCO 1881 Closure Mold
USA
Injection Mold - 32 Cavity - 214 Necked-In Hook Overcap Mold
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.
Looking to Sell?
Meadoworks is an active cash buyer of used industrial equipment. Get a free valuation from our AMEA-certified appraisers.
About Used Injection Molds
An injection mold is the tool that forms a plastic part, not the press that clamps it. These tools are often closures: a cap, a lid, a fitment. Fostag is a name that repeats. Cavitation is how many parts fall each shot. A 16-cavity cap mold and a single-cavity mold are different economics even when the cap looks the same. The finish on the neck, a PCO or another standard, has to be the finish you fill. A mold cut for a different neck is a different bottle.
Hot runner or a cold sprue is how the plastic gets to the cavities. A hot manifold saves regrind and needs heaters, thermocouples and a controller that still balances. A cold sprue is simpler and makes a runner you have to handle. Cooling circuits have to be open and labeled. A circuit that is plugged will not cool that cavity, and the part will warp or stick. Slides, lifters and an unscrewing core, when the neck or an undercut needs them, are the actions that fail. Ejector pins that are beaten will mark the part.
Steel, the parting line and the last resin are the condition. A mold that ran a glass-filled resin is worn in a way a mold that ran polyethylene is not. Venting that is peened will burn. Leader pins and bushings that are sloppy will flash. Water fittings and a wiring plug for the hot runner have to match the press you will hang it in. Shut height and the locating ring have to match that press too. The mold does not bring the clamp.
A used injection mold should be opened. Look at the cavities, the vents and the actions. Confirm cavitation, the neck standard and whether it is a hot manifold. Ask what resin it last ran. A mold you cannot mount, because the shut height or the knockout does not match your press, is a tool for a press you do not have. Match the press first, then the part. Water leaks at a cracked plate are a repair, not a gasket. Ask for the last shot if one is still in the crate, and read the flash and the knit.
How to Choose a Used Injection Mold
Cavities and the Neck, Not the Press
Count the cavities and read the neck finish against the bottle you must fit. A tool with the wrong finish is scrap, however pretty the steel is. Cavitation has to match the press you will run and the volume that makes the cycle worth it.
Fostag is the builder you will see. The machine that clamps the tool is not on this group. Shop the mold first. Shop the press after the mold is real.
What a Toolroom Look Finds
Parting line, vents, shutoffs, and rust in the cavities. A hot runner needs its heaters and its controller, not only the plates. Cooling should be open and identified.
Open the mold. A closed stack in a photo hides a ding that prints on every cap. If slides or unscrewing hardware make the neck, those pieces have to be present and moving. Missing components are part of the price of making parts.
Injection Mold Specs to Compare
| Spec | Why it matters |
|---|---|
| Cavity count | Cavitation sets output and the press size that can run the tool. |
| Neck finish | The bottle and the closure already in the market have to match the steel. |
| Runner | A hot runner is extra equipment. A cold runner is scrap and a different cycle. |
| Cooling | A plugged circuit changes the cycle and the dimensions of the cap. |
| Actions | A closure tool is often more than two plates. Those pieces have to be in the sale. |
| Resin | A different resin can move the finish even when the cavity count is right. |
Cavity count
Cavitation sets output and the press size that can run the tool.
Neck finish
The bottle and the closure already in the market have to match the steel.
Runner
A hot runner is extra equipment. A cold runner is scrap and a different cycle.
Cooling
A plugged circuit changes the cycle and the dimensions of the cap.
Actions
A closure tool is often more than two plates. Those pieces have to be in the sale.
Resin
A different resin can move the finish even when the cavity count is right.
What to Inspect on a Used Injection Mold
Open the stack
Look at every cavity and the parting line. A closed photo is not an inspection.
Read the neck finish
Compare it with the bottle standard you must hit. Close is not the same finish.
Count cavities against the press
The tool has to clamp and fill on a machine you have or will buy separately.
Find the hot-runner parts
Heaters, tips, and the controller, if the mold is a hot runner. Plates alone may not run.
Blow out the cooling
Circuits should be open. Rust and scale in the water are a cycle problem.
Move slides and ejectors
They should travel without a gall. A stuck slide is a toolroom job before the first shot.
Note rust and dings
Damage on a shutoff or in a cavity prints on every cap. Polish is not always enough.
Related Equipment
- Molds & Tooling
Parent group for injection, preform, and blow tools
- Injection Molding Machines
The press that clamps and fills the mold
Injection Molds Brands We've Sold
Common Applications
Frequently Asked Questions
What does cavity count tell me about an injection mold?
How many caps or closures drop every shot, which sets the output and the size of the press that can clamp and fill the tool. More cavities are not free. They need a machine, a cycle, and steel that is still in condition across every cavity. Count them with the mold open, not from a memory of the job. Then compare that count with the press you will actually use. The press is a separate purchase. Cavitation is the reason the two conversations have to meet.
How do I read a neck finish on an injection mold?
Match it to the bottle or the cap standard you already sell, a PCO finish or whatever the print names. The steel was cut for that geometry and for a resin shrink. A nearby finish is a different tool. Ask for the standard and compare it with a part or a drawing, not with a photo of the plates. Fostag tools here still have to pass that check. If the finish is wrong, no amount of press tonnage will make the cap fit the bottle.
Why is an injection mold not an injection molding machine?
The mold is the cavity. The machine is the clamp, the screw, and the shot. This group sells the tool. Machine groups sell the press. Buying a stack of plates will not give you a molding cell, and buying a press will not give you a neck finish. Once the mold matches the closure, then you shop a machine that can run that cavitation and that resin. Keep the two purchases apart so a toolroom problem does not get solved with the wrong tonnage.
What should I look at on the parting line of an injection mold?
Dings, wear, and whether the shutoffs still close. Flash on a cap starts there, and in the vents. Open the mold and look cavity by cavity, including rust that will print. Slides and unscrewing hardware, if the neck uses them, have to move. A hot-runner mold also needs its manifold and controller looked at, not only the cosmetic face of the cavity. Cooling should pass air or water. That is a tool inspection. It is not a machine runoff.
What runner and cooling details matter on an injection mold?
Whether the tool is a hot runner or a cold sprue, and whether the cooling circuits are open. A hot runner without heaters or a controller is a plate set. A cold runner is a different cycle and a regrind plan. Plugged water changes dimensions even when the cavities look sharp. Identify the circuits and blow them out. Resin matters too, because shrink was cut for a material. Write those facts down before you compare two tools that both say closure on the crate.
Which questions belong with a closure injection mold?
Neck finish, cavity count, resin, and whether every component is in the box. Those four decide if the tool makes your cap. Builder name, including Fostag, is context after that. Ask what was running when the plant stopped, and then verify it with the steel in front of you. A story about a cycle time is useful only if the cooling and the runner are intact. The molding machine is the next question, on a different group, after this one has a yes.
