N N Engineering is a specialised return pin manufacturers and suppliers in Pune. We proud ourselves in delivering high quality components that are in line with the strict requirements of the injection moulding industry. Our excellence, accuracy, and reliability guarantee that all the products we offer that will make your molding work more efficient and reliable return pin.
Return pin is an injection moulding component that is placed in the ejector mould to cause the system to return the ejector to its initial position after the part cylindrical dowel pin has been ejected. It provides a smooth working rate of the ejector mechanism, avoids jamming or misalignment, and can perform the same way during the repeated moulding cycles.
Types of Return Pin:
Being as outstanding return pin manufacturers in Pune, different types of this according to precision which are given below.
- Dowel Pins: These are hard cylindrical or tapered pins that are used to accurately position parts. They make sure that the parts are properly placed against each other so that the parts do not move, and that there is precision.
- Spring Pins (Slotted or Coiled): These pins are manufactured of soft material such as high-carbon steel to fix them with high strength. They squeeze as they are inserted forming a secure friction fit to give reliable connections in dynamic use.
- Cotter Pins & Lynch Pins: The main purpose of such pins is to hold fasteners or pins. They are used to clamp a component in place or to hold it in place so that it does not move or loosen and is mostly used in rotating structures.
- Clevis Pins: Clevis pins are threadless ones, having the head on one end and the hole on the other end to take a cotter or lynch pin. They are normally employed to provide a simple, removable pivot or hinge connection between two parts.
- Groove Pins: Groove pins are solid, cylindrical pins that are three or more longitudinal grooves imprinted in the surface of the pin. By forcing into a hole, the grooves become deformed, and thus a fircious, convincing fit is formed that is incresible to rotational and axial motion.
Technical Specifications of Return Pin:
We have added below a technical sheet of return pin in Pune that provides more technical information such as:
| Specification |
Details |
| Material |
SUJ2, S45C (hardened steels), others on request |
| Head Type |
Standard, tapped (single/both ends), counterbore |
| Tolerance (Diameter) |
Df6 (standard precision) |
| Length |
From standard to extended—configurable per requirement |
| Head Thickness |
Options include 4 mm, 8 mm—custom designs available |
| Safety Feature |
Mould locking if ejector plate fails to retract fully |
Benefits & Features of Return Pin
As a specialised return pin suppliers in Pune, we are offering a huge variety of return pin with the following benefits-
- Durable Construction: We make return pin with hard steel such as SUJ2 or S45C, which is very wear-resistant and long-lived.
- Exactly Engineered: We return pin manufacturers in Pune that have close tolerances (e.g., Df6) provide a tight fit inside the ejector guide, providing repeatable performance.
- Safety and Mold Protection: Our return pin simply prevents harm or collision by physically closing the mould when the ejector plate is not completely retracted.
- Thermal Compensation: Our pin created with clearances (H7/f6) to fit in the face of thermal expansion, and to prevent jamming in a high-heat environment.
- Multiple Finish Options: We offer hardened, nitrided finishes or corrosion-resistant finishes to match the exact requirements of the application.
Applications of Return Pin
One of the most understandable return pin manufacturers in Pune, our entire range of return pin is used in various applications-
- Injection Moulding: We provide critical assistance in plastic moulds to reposition the ejector plate to permit smooth closing of the mould and subsequent start of the next shot.
- Die Casting: Our pin provides a secure ejector system retraction in high-pressure mould conditions.
- Auto and Elemica Manufacturing: We return pin suppliers in Pune that can be applied to high-precision parts where ejector position is most important to quality and repeatability.
- Custom Mould Solutions: Our pin is used in conjunction with moulds that have complicated ejector assemblies or custom applications with cylindrical dowel pin alignments.
N N Engineering is a special return pin manufacturers and suppliers in Pune; it supplies a vital element to the efficient functioning of injection moulds. Our pins on the return are designed to be made of hardened steel that is strong enough to give way completely during the ejection system, eliminating any damage to the mould and providing a stable performance. Our pin is used in injection molding, die casting, and high precision manufacturing and are a key component of enhancing the safety, efficiency, and overall quality of your production cycles.
Need a reliable return pin? Contact Us.
