<!DOCTYPE html
  PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<!--
Copyright (c) 2006 UGS Corp.

All Rights Reserved.

This software and related documentation are proprietary to UGS Corp.
-->
<html>
   <head>
      <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
      <title>Trim Region Patch</title>
      <script language="javaScript">
        abridged="false";
        displayConditions=new Array();
      </script>
      <link type="text/css" href="../css/main_styles.css" rel="stylesheet">
   </head>
   <body class="bodydocs" onload="top.pageLoader()" bgcolor="#FFFFFF">
      <div class="title_topic2" id="xps10_pagetitle">Trim Region Patch</div>
      <hr noshade="true">
      <p class="para_topic">The Trim Region Patch function models shut off faces for openings within a product model.</p>
      <div class="figure">
         <p align="center"><img align="bottom" src="graphics/ico_t_trim_region_patch.gif"></p>
      </div>
      <div class="title_figure">Trim Region Patch button</div>
      <p class="para_topic">Before beginning the trim region patch process the user must create a solid patch body that fits the shut-off opening. The patch body must fill the opening completely to form the shut-off faces. The patch-body has other faces that aren't used to form the shut off and it doesn't matter if these faces are on the core or cavity side of the part as they are trimmed off by the Trim Region Patch function. &nbsp;</p>
      <p class="para_topic">The Trim Region Patch function procedure is as follows:</p>
      <ol type="1" start="1">
         <li>
            <p class="para_item">Select the solid patch body.</p>
         </li>
         <li>
            <p class="para_item">Select a loop of edges or curves using the Traverse Loop function to form a closed edge/curve chain boundary around the shut-off opening. These edges and curves must contact the patch solid.</p>
         </li>
         <li>
            <p class="para_item">Accept the trim direction or flip the direction to change the faces from the patch solid that are extracted and trimmed to form the Trim Region Patch faces. A patch feature is created if the trimming operation is successful.</p>
            <p class="para_item">Trim patch regions are added to the cavity and core parting regions.</p>
            <p class="para_item">An example of an internal shut-off opening and the trim patch region process is illustrated in the following:</p>
            <p align="center"><img align="bottom" src="graphics/trim_region_patch_1.jpg"></p>
            <p align="center"><img align="bottom" src="graphics/trim_region_patch_2.jpg"></p>
            <ol type="a" start="1">
               <li>
                  <p class="para_item">Create a solid box to fit the open area of the product. &nbsp;Select the patch body.</p>
                  <p align="center"><img align="bottom" src="graphics/trim_region_patch_3.jpg"></p>
                  <p align="center"><img align="bottom" src="graphics/trim_region_patch_4.jpg"></p>
               </li>
               <li>
                  <p class="para_item">Traverse an edge/curve loop.</p>
               </li>
            </ol>
            <p align="center"><img align="bottom" src="graphics/trim_region_patch_5.jpg"></p>
            <p align="center"><img align="bottom" src="graphics/trim_region_patch_6.jpg"></p>
         </li>
         <li>
            <p class="para_item">Accept or flip trim result and create a trim region.</p>
            <p align="center"><img align="bottom" src="graphics/trim_region_patch_7.jpg"></p>
            <p align="center"><img align="bottom" src="graphics/trim_region_patch_8.jpg"></p>
         </li>
      </ol>
   </body>
</html>