{"product_id":"ko-support-pillar-mold-foot-spacer","title":"KO Support Pillar \u0026 Mold Foot Spacer","description":"\u003cp\u003e\u003cstrong\u003eKO support pillars and mold foot spacers, made to your drawing.\u003c\/strong\u003e The columns that stand between the support plate and the clamping plate, carrying injection pressure that would otherwise bend the cavity plate down into the ejector space. Send a drawing, the required height, or the existing pillar photographed against a caliper, and we quote in writing, normally within one business day.\u003c\/p\u003e\u003ch2\u003eWhat these actually carry, and why the height is critical\u003c\/h2\u003e\u003cp\u003eBehind the cavity plate is a hollow — the ejector housing. Injection pressure pushes on the cavity face, and without support that plate deflects into the hollow. The result is flash that appears only at high pressure, a parting line that opens in the middle of the mold and not at the edges, or a dimension that changes with injection pressure rather than with temperature.\u003c\/p\u003e\u003cp\u003eSupport pillars stop that. Which makes their \u003cstrong\u003eheight match\u003c\/strong\u003e the specification that matters most:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eToo short and they do nothing.\u003c\/strong\u003e A pillar 0.03 mm under height carries no load until the plate has already deflected 0.03 mm — which is usually most of the deflection you were trying to prevent.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eToo tall and they pre-load the plate the wrong way\u003c\/strong\u003e, holding the mold open at the centre and causing flash at the parting line before injection even starts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThey must match each other.\u003c\/strong\u003e As with parallel blocks, what matters is that the set is consistent, to a tighter band than any one is to nominal.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eNormal practice is to make pillars very slightly proud — a few hundredths — so they take load as the plate begins to move. Tell us your convention, or ask and we will state on the quotation what we would hold.\u003c\/p\u003e\u003ch2\u003eBearing area, not just strength\u003c\/h2\u003e\u003cp\u003eThese fail by indenting their end faces into the plates rather than by crushing. A pillar with a small footprint under high clamp force beds in over time, and once it has bedded in, the height is wrong again. If you are increasing injection pressure on an existing mold, the pillar diameter is worth revisiting rather than assuming the original was sized with margin.\u003c\/p\u003e\u003ch2\u003eThrough bores, threads and shoulders\u003c\/h2\u003e\u003cp\u003ePillars are often bored to pass an ejector pin or a return pin, or threaded so they can be pulled out for service. If you need either, say so — a through bore changes both the load capacity and the machining, and a thread at one end changes how the end face bears. End-face flatness and parallelism should be called out where they matter, because they are what actually transmits the load.\u003c\/p\u003e\u003ch2\u003eWhat to send us\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eOutside diameter, or the profile if it is not round\u003c\/li\u003e\n\u003cli\u003eOverall length, and the height tolerance and set-to-set match you need\u003c\/li\u003e\n\u003cli\u003eThrough bore, counterbore, internal thread or shoulder dimensions\u003c\/li\u003e\n\u003cli\u003eEnd-face flatness and parallelism requirements\u003c\/li\u003e\n\u003cli\u003eMounting method, and whether the pillar is dowelled, threaded or a slip fit\u003c\/li\u003e\n\u003cli\u003eClamp force and injection pressure, if you want us to sanity-check the footprint\u003c\/li\u003e\n\u003cli\u003eMaterial, heat treatment, tolerance, quantity and destination\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eReplacing pillars on a mold that flashes under pressure? Measure all of them and send the numbers. If they differ, or if the end faces show a bright bedded ring, you have found the cause before anything is made.\u003c\/p\u003e\u003ch2\u003eDocumentation and confidentiality\u003c\/h2\u003e\u003cp\u003eMaterial certificates, hardness results and dimensional inspection reports are available on request, with scope and cost confirmed in the quotation. Technical files are used to evaluate and fulfill your inquiry or order. They may be shared only with relevant manufacturing, inspection, logistics or service partners as needed. Send only files you are authorized to share. See our \u003ca href=\"\/pages\/privacy-policy\"\u003ePrivacy Policy\u003c\/a\u003e. NDA on request from \u003ca href=\"mailto:rfq@privleymold.com\"\u003erfq@privleymold.com\u003c\/a\u003e.\u003c\/p\u003e","brand":"Privley Mold Components","offers":[{"title":"Default Title","offer_id":52126010540252,"sku":"PMC-KO-SP","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0846\/7650\/9916\/files\/privley-ko-support-pillar-rfq-diagram_d92dbd29-6719-42c6-bb26-ad52080c1238.png?v=1785388365","url":"https:\/\/privleymold.com\/products\/ko-support-pillar-mold-foot-spacer","provider":"Privley Mold Components","version":"1.0","type":"link"}