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- T2 Injection Machine
T2 Injection Machine
/shop/t2-injection-machine-47Inject plastic with the press of a button
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Inject Plastic with the press of a button
Outsource the hard work of injecting to a powerful motor, giving you more time to focus on the moulds and the products - because you're going to be making a lot of them with T2.
CNC Machine DNA
Distilling years of experience repairing and building industrial CNC machines, the T2 is rugged, heavy duty - and built to be used. With a carbon steel chassis and heavy duty linear bearings, T2 is guaranteed to last.
The first half of 2022 has been spent designing this machine, doing FEA analysis, writing hundreds of lines of code to control the motion, optimising the flow in the system that merges the two barrels - it's been a massive undertaking! With over 200 fasteners, nearly 100 meters of wire, and an estimated 1100 hours of development time - I'm incredibly pleased to offer the first Precious Plastic fully electric double barrel injection machine for sale.
With no pneumatics, no air compressor or hydraulic fluid - a fully electric machine is plug and play.
A big consideration for this project was having a large injection capacity. In fact the largest capacity of any Precious Plastic machine to date!* Even if you never intend to make 430 gram items, what it means is that by topping up the hopper while using the machine, you can fill a mould with 50 grams of plastic every 2 minutes, without ever stopping!
*Based on market research
Example Capacity
Scenario
Let's take a moment to make a comparison. Pretend you have a shiny new mould for a 50 gram part - and two machines.
Machine A has a 100 gram shot size, plenty for your 50 gram mould. However you must remember that once refilled with plastic it will need to sit and let the new plastic melt before getting another two shots. (for the sake of this example, lets say both machines can melt fresh plastic in 6 minutes flat)
Machine B has a 400 gram shot size. That's a lot! However by the time you could fill your mould 8 times, new plastic will be melted - so it would be able to continuously fill the mould again and again with zero down time.
Let's have a look at how that might play out over a 15 minute work session.
Machine A
100 Gram capacity arbor, lever, pneumatic or electric Injection Machine, with mould for a 50 gram part
Machine B
400 Gram capacity arbor, lever, pneumatic or electric Injection Machine, with mould for a 50 gram part
- Inject!
- Add 50 grams of new plastic
- 50 grams of melted plastic remaining
- Inject!
- Add 50 grams of new plastic
- 350 grams of melted plastic remaining
- Inject!
- Add 50 grams of new plastic
- 0 grams of melted plastic remaining
- Inject!
- Add 50 grams of new plastic
- 300 grams of melted plastic remaining
- Inject!
- Add 50 grams of new plastic
- 250 grams of melted plastic remaining
- Inject!
- Add 50 grams of new plastic
- 200 grams of melted plastic remaining (plastic from 12:02 is melted)
- (plastic from 12:00 is melted)
- Inject!
- Add 50 grams of new plastic
- 50 grams of melted plastic remaining
- (plastic from 12:00 is melted)
- Inject!
- Add 50 grams of new plastic
- 200 grams of melted plastic remaining
- (plastic from 12:02 is melted)
- Inject!
- Add 50 grams of new plastic
- 0 grams of melted plastic remaining
- (plastic from 12:02 is melted)
- Inject!
- Add 50 grams of new plastic
- 200 grams of melted plastic remaining
- (plastic from 12:04 is melted)
- Inject!
- Add 50 grams of new plastic
- 200 grams of melted plastic remaining
- (plastic from 12:06 is melted)
- Inject!
- Add 50 grams of new plastic
- 200 grams of melted plastic remaining
Results
12:15
Parts Produced
Parts Produced
As you can see, at the end of a 15 minute working session, a machine with 2x the capacity required for the part was able to make only four parts. While a machine with 16x the required capacity was able to make double that many parts.
It's worth noting that these are not exact figures, please don't base your business model off of this chart 😉 However it clearly demonstrates that a machine just above the required capacity is not an efficient machine for that part. Whether mass producing to sell a product, or ensuring that 40 students each get a turn - having excess capacity not only future proof's your investment against unknown larger projects, but guarantees minimal or zero downtime, waiting for plastic to melt.
Don't underestimate the importance of shot size or machine capacity!
All Things Considered
In most workshops - especially mine, space is at a premium.
Designed for wall mounting, or tabletop. The T2 sits only 110mm deep, meaning with (optional) wall brackets the machines can be mounted along a wall and take up virtually no floor space.
If being used on a bench, the unit can be equipped with free standing legs, or bolted directly into the surface.
If wall mounting, an optional height adjustment system can be ordered, allowing operators in wheelchairs to easily lower the unit to a comfortable working height.
- Height: 1300mm
- Width: 270mm (not including side mounted control panel)
- Depth: 110mm
- Weight: approx. 55kg
It's a long way down here - however T2 stands just 1100mm tall.
Motion
Like any machine with moving parts, avoiding injury is paramount! T2 helps protect from injuries of this kind by moving slow. Unlike pneumatics, movement in an electric system is controlled and steady.
And by adding a second barrel, we are able to move half the speed of a single barrel machine, while still getting the same flow rate of plastic.
Electronics
T2 was designed using inherently safe methodology. It stands alone with chassis grounding, built in over current protection and an on board RCD. Far exceeding standard Australian requirements.
This means if the machine was to be operated on a circuit without grounding, and a fault occurred electrifying the chassis - even then the user would be protected from electric shock.
Heat
A machine designed to melt plastic at 200c is bound to have some hot bits. However T2 goes the extra mile by enclosing all but the bare minimum in layers of ceramic insulation, and then closing that off within a metal case.
Even after 8 hours at 200c, the outer case does not get hot enough to cause burns, and T2 carries bold HOT SURFACE warnings both front and back.