Received: from PCH.mit.edu (18.7.21.50) by mail.efplus.com (192.168.0.8) with Microsoft SMTP Server (TLS) id 8.3.485.1; Sun, 18 Jul 2021 08:23:35 -0700 Received: from PCH.MIT.EDU (localhost.localdomain [127.0.0.1]) by PCH.mit.edu (8.14.7/8.12.8) with ESMTP id 16IFCs99025246; Sun, 18 Jul 2021 11:13:50 -0400 Received: from outgoing-exchange-1.mit.edu (OUTGOING-EXCHANGE-1.MIT.EDU [18.9.28.15]) by PCH.mit.edu (8.14.7/8.12.8) with ESMTP id 16IFCrBK025243 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL) for ; Sun, 18 Jul 2021 11:12:53 -0400 Received: from oc11exedge2.exchange.mit.edu (OC11EXEDGE2.EXCHANGE.MIT.EDU [18.9.3.18]) by outgoing-exchange-1.mit.edu (8.14.7/8.12.4) with ESMTP id 16IFCIJp032376 for ; Sun, 18 Jul 2021 11:12:53 -0400 Received: from oc11expo14.exchange.mit.edu (18.9.4.19) by oc11exedge2.exchange.mit.edu (18.9.3.18) with Microsoft SMTP Server (TLS) id 15.0.1497.23; Sun, 18 Jul 2021 11:12:24 -0400 Received: from w92exhyb1.exchange.mit.edu (18.7.71.12) by oc11expo14.exchange.mit.edu (18.9.4.19) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Sun, 18 Jul 2021 11:12:27 -0400 Received: from NAM11-BN8-obe.outbound.protection.outlook.com (104.47.58.169) by w92exhyb1.exchange.mit.edu (18.7.71.12) with Microsoft SMTP Server (TLS) id 15.0.1497.23 via Frontend Transport; Sun, 18 Jul 2021 11:12:26 -0400 Received: from DM5PR16CA0010.namprd16.prod.outlook.com (2603:10b6:3:c0::20) by SJ0PR01MB6416.prod.exchangelabs.com (2603:10b6:a03:295::9) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4331.23; Sun, 18 Jul 2021 15:12:26 +0000 Received: from DM6NAM11FT024.eop-nam11.prod.protection.outlook.com (2603:10b6:3:c0:cafe::dc) by DM5PR16CA0010.outlook.office365.com (2603:10b6:3:c0::20) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4331.21 via Frontend Transport; Sun, 18 Jul 2021 15:12:26 +0000 Received: from premium47-5.web-hosting.com (68.65.123.245) by DM6NAM11FT024.mail.protection.outlook.com (10.13.172.159) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4331.21 via Frontend Transport; Sun, 18 Jul 2021 15:12:25 +0000 Received: from 107-145-228-221.res.spectrum.com ([107.145.228.221]:56122 helo=[192.168.1.169]) by premium47.web-hosting.com with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.94.2) (envelope-from ) id 1m58Sq-000khg-9L; Sun, 18 Jul 2021 11:12:24 -0400 From: Neil To: "piclist@mit.edu" Sender: "piclist-bounces@mit.edu" Date: Sun, 18 Jul 2021 08:12:20 -0700 Subject: Re: [EE] plastic molding question Thread-Topic: [EE] plastic molding question Thread-Index: Add76ODy1KJ4Da/AQ2Kv3o7upnvx9A== Message-ID: <11865ad5-7f15-8ebf-ccd0-8c0624bf36a2@narwani.org> References: List-Help: List-Subscribe: , List-Unsubscribe: , In-Reply-To: Reply-To: Microcontroller discussion list - Public. Accept-Language: en-US Content-Language: en-US X-MS-Exchange-Organization-AuthAs: Anonymous X-MS-Exchange-Organization-AuthSource: TS500.efplus4.local X-MS-Has-Attach: X-Auto-Response-Suppress: All X-MS-Exchange-Organization-SenderIdResult: Pass X-MS-Exchange-Organization-PRD: mit.edu X-MS-TNEF-Correlator: received-spf: None (protection.outlook.com: narwani.org does not designate permitted sender hosts) dkim-signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=narwani.org ; s=default; h=Content-Type:In-Reply-To:MIME-Version:Date:Message-ID:From: References:To:Subject:Reply-To:Sender:Cc:Content-Transfer-Encoding:Content-ID :Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To: Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe :List-Post:List-Owner:List-Archive; bh=5IMX6AEily4CgwaMOKiPwpd0Ou9iAxFLMyoERl3OqqY=; b=E3a/qdpMNecuTRh5VKWlX1VciT JGOcwfJEcMFRHUjQDxS5XeKXbNsD9qphhyo53DtEuBsefxZijBec0pOscgSeb4z3kUtCKcgR0RJri kDLROx6L2/ixUTtigM/iPqdsqwpE458NGNnH7aSvb5FMJOebdSXhyfK3ISJrBRBVAC1kfw6X/52nd K+QhrINfXmHHf0wWJTco5m7vC1CLTvWAN1doDAQYI008GXL8KPDi7ctjKtq5/UAwrcWIhMq0vg5Kd WkvyPbpPBda+Vfwl0VYrq28IFbdVynzrFuJM0l+HIHYUiNfompOaeEW6cRFfAz/741r1PB61kMt8G xR+mgGMQ==; authentication-results: spf=none (sender IP is 68.65.123.245) smtp.mailfrom=narwani.org; mit.edu; dkim=fail (body hash did not verify) header.d=narwani.org; mit.edu; dmarc=none action=none header.from=narwani.org; user-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.12.0 errors-to: piclist-bounces@mit.edu list-id: "Microcontroller discussion list - Public." list-post: x-beenthere: piclist@mit.edu x-mailman-version: 2.1.6 x-source-args: x-source-dir: x-antiabuse: Sender Address Domain - narwani.org x-source: x-authenticated-sender: premium47.web-hosting.com: ca4@narwani.org x-topics: [EE] x-content-filtered-by: Mailman/MimeDel 2.1.6 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 I've CADded a few parts for injection molding.=A0 I usually let the=20 injection molder add sprues, gates, etc as they know their=20 machines/tolerances. This is called a boss or nib, but I don't recognize this as having any=20 purpose for the injection molding process.=A0 It's seems very deliberate=20 to the design.=A0 Like some sort of locator peg. Cheers, -Neil. On 7/17/2021 10:34 PM, Bob Blick wrote: > What is this molding feature called? > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .