{"product_id":"mold-return-pins-pack-of-4","title":"Mold Return Pins — Pack of 4","description":"\u003cp\u003eReturn pins for injection mold ejector systems, sold in \u003cstrong\u003epacks of 4\u003c\/strong\u003e — the quantity a standard mold uses. Sizes are given as \u003cstrong\u003ediameter × length\u003c\/strong\u003e in millimetres.\u003c\/p\u003e\n\n\u003ch2\u003eWhat they do, and why all four matter\u003c\/h2\u003e\n\u003cp\u003eReturn pins push the ejector plate back to its home position as the mold closes, before the core and cavity meet. They work as a set of four at the corners of the ejector plate, and their job is as much about keeping that plate square as it is about returning it.\u003c\/p\u003e\n\u003cp\u003eThat is why we sell them in fours. Replacing one worn pin out of four leaves you with three worn pins and one tight new one, which cocks the plate slightly on every stroke — and a cocked ejector plate is what turns into bent ejector pins, galled guide bushings and a plate that sticks halfway. If one has worn enough to need replacing, the other three are the same age.\u003c\/p\u003e\n\n\u003ch2\u003eLength is not optional\u003c\/h2\u003e\n\u003cp\u003eThe return pin face has to finish exactly flush with the parting line. Proud, and the pin holds the mold open a fraction — you get flash all round the parting line and, on a bad day, a damaged face when the machine clamps anyway. Short, and the ejector plate never fully returns, so the ejector pins stand proud into the cavity and the next shot mars or short-fills.\u003c\/p\u003e\n\u003cp\u003eMeasure the existing pin, or measure from the ejector plate seat to the parting face with the plate fully back. If you are working from a drawing rather than a tool, tell us the plate stack and we will confirm the length before shipping.\u003c\/p\u003e\n\n\u003ch2\u003eCheck the springs at the same time\u003c\/h2\u003e\n\u003cp\u003eReturn pins are usually fitted alongside ejector return springs, and a weak spring makes a good return pin look faulty — the plate does not start home, then the pins take the whole load at close instead of easing it back. If you are replacing return pins on an older tool, it is worth checking the springs in the same shutdown. \u003ca href=\"\/collections\/die-springs\"\u003eSee die springs\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDiameters\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eØ12, Ø16\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLengths\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eØ12: 80–250 mm  |  Ø16: 100–140 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePack quantity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4 pieces — one mold set\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOrigin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDanyang, Jiangsu, China\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eLarger diameters and longer pins\u003c\/h2\u003e\n\u003cp\u003eØ15, Ø20, Ø25 and Ø30 are all stocked, in lengths to 500 mm — but a set of four Ø25 pins is several kilograms and does not belong on a flat parcel rate. \u003ca href=\"\/pages\/request-a-quote\"\u003eRequest a quote\u003c\/a\u003e for those and we will price the freight properly against your destination rather than bury it in the item price. Tapped return pins are also available.\u003c\/p\u003e\n\n\u003ch2\u003eShipping\u003c\/h2\u003e\n\u003cp\u003eInternational freight is calculated on packed chargeable weight. See \u003ca href=\"\/pages\/shipping-delivery\"\u003eShipping \u0026amp; Delivery\u003c\/a\u003e for destinations and transit times. Import duties and taxes are the buyer's responsibility — please read the duties section on that page before ordering.\u003c\/p\u003e","brand":"Privley Mold Components","offers":[{"title":"12 × 80","offer_id":52427891441884,"sku":"PMC-RETP-001","price":10.9,"currency_code":"USD","in_stock":true},{"title":"12 × 90","offer_id":52427891474652,"sku":"PMC-RETP-002","price":12.9,"currency_code":"USD","in_stock":true},{"title":"12 × 100","offer_id":52427891507420,"sku":"PMC-RETP-003","price":13.9,"currency_code":"USD","in_stock":true},{"title":"12 × 110","offer_id":52427891540188,"sku":"PMC-RETP-004","price":14.9,"currency_code":"USD","in_stock":true},{"title":"12 × 120","offer_id":52427891572956,"sku":"PMC-RETP-005","price":15.9,"currency_code":"USD","in_stock":true},{"title":"12 × 130","offer_id":52427891605724,"sku":"PMC-RETP-006","price":16.9,"currency_code":"USD","in_stock":true},{"title":"12 × 140","offer_id":52427891638492,"sku":"PMC-RETP-007","price":17.9,"currency_code":"USD","in_stock":true},{"title":"12 × 150","offer_id":52427891671260,"sku":"PMC-RETP-008","price":18.9,"currency_code":"USD","in_stock":true},{"title":"12 × 160","offer_id":52427891704028,"sku":"PMC-RETP-009","price":19.9,"currency_code":"USD","in_stock":true},{"title":"12 × 170","offer_id":52427891736796,"sku":"PMC-RETP-010","price":20.9,"currency_code":"USD","in_stock":true},{"title":"12 × 180","offer_id":52427891769564,"sku":"PMC-RETP-011","price":21.9,"currency_code":"USD","in_stock":true},{"title":"12 × 190","offer_id":52427891802332,"sku":"PMC-RETP-012","price":24.9,"currency_code":"USD","in_stock":true},{"title":"12 × 200","offer_id":52427891835100,"sku":"PMC-RETP-013","price":28.9,"currency_code":"USD","in_stock":true},{"title":"12 × 210","offer_id":52427891867868,"sku":"PMC-RETP-014","price":32.9,"currency_code":"USD","in_stock":true},{"title":"12 × 220","offer_id":52427891900636,"sku":"PMC-RETP-015","price":34.9,"currency_code":"USD","in_stock":true},{"title":"12 × 230","offer_id":52427891933404,"sku":"PMC-RETP-016","price":38.9,"currency_code":"USD","in_stock":true},{"title":"12 × 240","offer_id":52427891966172,"sku":"PMC-RETP-017","price":42.9,"currency_code":"USD","in_stock":true},{"title":"12 × 250","offer_id":52427891998940,"sku":"PMC-RETP-018","price":45.9,"currency_code":"USD","in_stock":true},{"title":"16 × 100","offer_id":52427892031708,"sku":"PMC-RETP-019","price":16.9,"currency_code":"USD","in_stock":true},{"title":"16 × 110","offer_id":52427892064476,"sku":"PMC-RETP-020","price":17.9,"currency_code":"USD","in_stock":true},{"title":"16 × 120","offer_id":52427892097244,"sku":"PMC-RETP-021","price":19.9,"currency_code":"USD","in_stock":true},{"title":"16 × 130","offer_id":52427892130012,"sku":"PMC-RETP-022","price":20.9,"currency_code":"USD","in_stock":true},{"title":"16 × 140","offer_id":52427892162780,"sku":"PMC-RETP-023","price":21.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0846\/7650\/9916\/files\/mold-return-pins-pack-of-4-main.png?v=1788927725","url":"https:\/\/privleymold.com\/products\/mold-return-pins-pack-of-4","provider":"Privley Mold Components","version":"1.0","type":"link"}