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 08:24:03 -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 16IFFSw4025752; Sun, 18 Jul 2021 11:15:58 -0400 Received: from outgoing-exchange-3.mit.edu (OUTGOING-EXCHANGE-3.MIT.EDU [18.9.28.13]) by PCH.mit.edu (8.14.7/8.12.8) with ESMTP id 16IFFQ62025749 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL) for ; Sun, 18 Jul 2021 11:15:26 -0400 Received: from oc11exedge2.exchange.mit.edu (OC11EXEDGE2.EXCHANGE.MIT.EDU [18.9.3.18]) by outgoing-exchange-3.mit.edu (8.14.7/8.12.4) with ESMTP id 16IFFQoR015253 for ; Sun, 18 Jul 2021 11:15:26 -0400 Received: from w92exhyb2.exchange.mit.edu (18.7.71.32) by oc11exedge2.exchange.mit.edu (18.9.3.18) with Microsoft SMTP Server (TLS) id 15.0.1497.23; Sun, 18 Jul 2021 11:15:23 -0400 Received: from oc11exhyb4.exchange.mit.edu (18.9.1.100) by w92exhyb2.exchange.mit.edu (18.7.71.32) with Microsoft SMTP Server (TLS) id 15.0.1497.23; Sun, 18 Jul 2021 11:15:25 -0400 Received: from NAM11-BN8-obe.outbound.protection.outlook.com (104.47.58.171) by oc11exhyb4.exchange.mit.edu (18.9.1.100) with Microsoft SMTP Server (TLS) id 15.0.1497.23 via Frontend Transport; Sun, 18 Jul 2021 11:15:25 -0400 Received: from DM6PR17CA0027.namprd17.prod.outlook.com (2603:10b6:5:1b3::40) by BL0PR01MB4017.prod.exchangelabs.com (2603:10b6:208:27::16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4331.21; Sun, 18 Jul 2021 15:15:24 +0000 Received: from DM6NAM11FT055.eop-nam11.prod.protection.outlook.com (2603:10b6:5:1b3:cafe::b8) by DM6PR17CA0027.outlook.office365.com (2603:10b6:5:1b3::40) 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 15:15:24 +0000 Received: from premium47-5.web-hosting.com (68.65.123.245) by DM6NAM11FT055.mail.protection.outlook.com (10.13.173.103) 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 15:15:24 +0000 Received: from 107-145-228-221.res.spectrum.com ([107.145.228.221]:64229 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 1m58Vi-000owp-8A; Sun, 18 Jul 2021 11:15:23 -0400 From: Neil To: "piclist@mit.edu" Sender: "piclist-bounces@mit.edu" Date: Sun, 18 Jul 2021 08:15:17 -0700 Subject: Re: [EE] plastic molding question Thread-Topic: [EE] plastic molding question Thread-Index: Add76PFpXu8c4y9uRdGMofD24UMdow== Message-ID: <4ee7d7eb-5af0-fb97-a296-bcfe0a348c7a@narwani.org> References: <11865ad5-7f15-8ebf-ccd0-8c0624bf36a2@narwani.org> List-Help: List-Subscribe: , List-Unsubscribe: , In-Reply-To: <11865ad5-7f15-8ebf-ccd0-8c0624bf36a2@narwani.org> 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: References:To:From: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=guB/LZBJGdDoxa1LmMorEfdqshTcDmp+G3cI6tD44xY=; b=xXIaWj5wNJR4dcZ9qx5fjybFYL tjU5IdGhJuNJNsBXokmnmQt+8SA1aX6CAeqTaeuZSIOtalvaIL2K6gw0H2lKP9tITbUh4IZMN5QmG 50/QObGQjjoNZQFTvOQKgUcx1VcTy0V+0Ni1eOLuxFsSqx+n8KtCVH7W6hNc5Wx4GzR50lN7dqB8J Eevm198ON6BHtcEhth+DED4LQbZA5Q6OAi9I3SjNOUCWyW9tq4H+DWD1VtDdRvcayC5l4VsuAusMU 8wPwNh5TE/MlCUeEyBEsL0/it7AqSU5nbzPLugonxC7P0Z29uUqFOfszi0jwE4AD6KJfKf70xzv+9 D/WoTRrg==; 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 Of course I only think to check the datasheet after I send that email :| Datasheet here https://pickercomponents.com/pdf/Relays/PTRA-T.pdf says under "MOUNTING TYPE (mm/inches)":=A0=A0 "Knock off, on top corner, ni= b=20 for ventilation after soldering and water wash." Cheers, -Neil. On 7/18/2021 11:12 AM, Neil wrote: > 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 .