Odvzdušňovací vyhazovače HelixPin
A mold you won’t even notice…
Every conventional round ejector can be replaced with a HelixPin ejector, once and for all solving the entire range of issues caused by insufficient venting.
Self-cleaning effect
The groove design is engineered so that it does not obstruct the exiting gases and prevents the mold from becoming contaminated due to condensation of overheated vapors of polymer substances, colorants, additives, and water.
The ejector pin hole remains clean, and any minimal deposits accumulate in the ejector groove, from where they can be easily cleaned directly on the machine without the need to dismantle the ejection system.
Instructions for Ordering in the Configurator
If a special ejector (US, Japanese, or ejector with seating) is not required, only 3 dimensions are needed: nominal diameter (d), L min and L max. If L max is entered including the allowance for fitting, it will be supplied exactly as entered (it is cut with an accuracy of ±0.01 mm). However, if L min is entered with an allowance (for example several tenths up to a millimetre), there is a risk that the ejector will be overmoulded, because the position of the grooves is defined precisely from this dimension. Do not estimate or round the L min dimension upwards, but read it accurately to hundredths (professionally) from the model, or measure it in the actual position in the mould.
1. Clarify the required ejectors and log in to the configurator.
2. Log in to the system and find a suitable ejector blank (diameter and length with allowance).
2. Find the diameter and length of the semi-finished product in the tables.
Click the magic pencil in the row with the desired ejector.
3. Check the diameter and other dimensions in the editor.
Fill in the Lmax and Lmin dimensions.
If the ejector will be machined to shape independently, the Lmax dimension can be entered with an allowance for finishing.
BUT!!! The Lmin dimension must be entered exactly as it is in the mould or model.
Never estimate Lmin or round it up, because the position of the grooves, efficiency, and the risk of flash depend on it.
4. Check and create an inquiry, or send the order right away.
The method of venting ejector pins used so far relies on longitudinal grooves ground along the cylindrical surface of the ejector. The disadvantage of this solution is that the longitudinal groove on the ejector causes clogging of the passage in practice, in places where it is not possible to clean it without disassembling the mold (in the H7 hole).
The magic of the steep-pitch helical groove lies in the fact that the ejector hole remains clean, while deposits accumulate in the ejector groove, where they can be easily cleaned directly on the machine without the need to dismantle the ejection system.
FAQ:
Is it possible to equip already finished or duplicate ejector pins in an existing, running mold with a Helix Pin groove?
YES, this is the simplest and fastest option. Send the individual or duplicate ejector pins to us and they will be machined with a Helix groove (and optionally a DLC coating) and sent back. (Lead time is up to one week, for DLC coating +2 weeks)
Is it possible to order helixPin ejectors as spare parts or semi-finished products that can be installed into the mold independently?
Yes, ejectors are manufactured to final dimensions or with machining allowance for finishing in the cavity. (Lead time is within one week; in the case of precise shape machining according to a model + 2 weeks, for DLC coating + 2 weeks)
Do you offer HelixPin as a “standard part”?
Not yet, but it is possible in the future and preparations are underway. Everything depends on how the specific ejector is finished in the mould cavity. If it is straight, the ejector is supplied with a finished groove and front face, and with a head for pinning from the rear. It is then shortened to the required length and a hole for pinning is made on the EDM machine.
In the case of integration into the cavity shape, an ejector with a sufficient distance of the “ring” is used so that the collecting groove is at least 1–2 mm below the level of the mould cavity. With machining allowance, the head is then pinned and the front face is machined in assembly.
Flat ejectors and venting grooves?
Yes, this is a very effective solution with great potential for reducing scrap rates in production. Similar principles apply here as with round ejectors. Get in touch to arrange the details.
For mounted or non-standard ejectors, e.g. (JAP / USA), a complete drawing is required.