{"id":17788,"date":"2026-09-11T11:36:24","date_gmt":"2026-09-11T03:36:24","guid":{"rendered":"https:\/\/hanchang.com.tw\/?post_type=portfolio&#038;p=17788"},"modified":"2026-10-16T02:30:33","modified_gmt":"2026-10-15T18:30:33","slug":"roller-electrode-high-frequency-preheater","status":"publish","type":"portfolio","link":"https:\/\/hanchang.com.tw\/en\/portfolio-item\/roller-electrode-high-frequency-preheater\/","title":{"rendered":"Roller-Electrode High-Frequency Preheater"},"content":{"rendered":"<section  class='av_textblock_section av-av_textblock-38de8658e34b1c811a7e6a2d06387eca '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock hc-product-layout-block'  itemprop=\"text\" ><style>#top.postid-17788 #main main.content {width:100%;border:0;padding-right:0;float:none;}\n#top.postid-17788 .hc-product-layout 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0 8px;font-size:18px;}\n#top.postid-17788 .hc-product-layout .hc-supply-trust p{margin:0;font-size:15px;}\n@media(max-width:1099px){#top.postid-17788 .hc-product-layout .hc-stat-band{grid-template-columns:repeat(2,minmax(0,1fr));}}\n@media(max-width:767px){#top.postid-17788 .hc-product-layout .hc-power-list table,#top.postid-17788 .hc-product-layout .hc-power-list tbody,#top.postid-17788 .hc-product-layout .hc-power-list tr{display:block;width:100%;}#top.postid-17788 .hc-product-layout .hc-power-list td{display:block;width:100%;white-space:normal;text-align:left;padding:12px 16px;}#top.postid-17788 .hc-product-layout .hc-power-list td:first-child,#top.postid-17788 .hc-product-layout .hc-power-list td:empty{display:none;}#top.postid-17788 .hc-product-layout .hc-supply-grid{grid-template-columns:minmax(0,1fr);}#top.postid-17788 .hc-product-layout .hc-supply-grid>.hc-card{padding:20px;}}\n@media(max-width:599px){#top.postid-17788 .hc-product-layout .hc-stat-band{grid-template-columns:minmax(0,1fr);gap:10px;}#top.postid-17788 .hc-product-layout .hc-stat strong{font-size:20px;}}<\/style>\n<div class=\"hc-product-layout\">\n<section class=\"hc-hero\">\n<div class=\"hc-hero-copy\"><span class=\"hc-eyebrow\">HAN CHANG \u00b7 COMPOUND PREHEATING<\/span><\/p>\n<h1>Roller-Electrode High-Frequency Preheater<\/h1>\n<div class=\"hc-product-tags\"><span>Twin roller electrodes<\/span><span>Cylindrical molding preforms<\/span><span>Timed heating \u00b7 automatic lid<\/span><\/div>\n<div class=\"hc-product-lead\">Han Chang\u2019s roller-electrode high-frequency preheater prepares cylindrical phenolic and epoxy molding preforms for compression or transfer molding. Twin roller electrodes rotate the charge during RF preheating, helping improve material flow, production efficiency and consistent molding quality. Applications center on electronic encapsulation, electrical insulation and motor components.<\/div>\n<div class=\"hc-actions\"><a class=\"hc-btn hc-btn-primary\" href=\"https:\/\/hanchang.com.tw\/en\/contact-us\/\">Request a quotation<\/a><a class=\"hc-btn hc-btn-secondary\" href=\"#hcproduct-specs\">View power options<\/a><\/div>\n<\/div>\n<div class=\"hc-product-static-machine-image\">\n<figure class=\"hc-product-machine-figure\"><img decoding=\"async\" alt=\"Shared cabinet reference: the photo shows the flat-platform version. The roller-electrode version uses twin rollers in the heating area.\" class=\"wp-image-4614\" data-attachment-id=\"4614\" fetchpriority=\"high\" height=\"450\" loading=\"eager\" src=\"https:\/\/hanchang.com.tw\/wp-content\/uploads\/2026\/03\/high-frequency-preheater-industrial.jpg\" width=\"450\" srcset=\"https:\/\/hanchang.com.tw\/wp-content\/uploads\/2026\/03\/high-frequency-preheater-industrial.jpg 450w, https:\/\/hanchang.com.tw\/wp-content\/uploads\/2026\/03\/high-frequency-preheater-industrial-200x200.jpg 200w, https:\/\/hanchang.com.tw\/wp-content\/uploads\/2026\/03\/high-frequency-preheater-industrial-80x80.jpg 80w, https:\/\/hanchang.com.tw\/wp-content\/uploads\/2026\/03\/high-frequency-preheater-industrial-36x36.jpg 36w, https:\/\/hanchang.com.tw\/wp-content\/uploads\/2026\/03\/high-frequency-preheater-industrial-180x180.jpg 180w\" sizes=\"(max-width: 450px) 100vw, 450px\" \/><figcaption>Shared cabinet reference: the photo shows the flat-platform version. The roller-electrode version uses twin rollers in the heating area.<\/figcaption><\/figure>\n<\/div>\n<\/section>\n<div class=\"hc-stat-band\">\n<div class=\"hc-stat\"><strong>Twin roller electrodes<\/strong><span>Rotate cylindrical preforms during heating.<\/span><\/div>\n<div class=\"hc-stat\"><strong>Phenolic and epoxy compounds<\/strong><span>Prepare molding charges for electronic and electrical parts.<\/span><\/div>\n<div class=\"hc-stat\"><strong>Timed heating cycle<\/strong><span>Heating stops and the lid opens automatically when time expires.<\/span><\/div>\n<div class=\"hc-stat\"><strong>Five power options<\/strong><span>3, 5, 7, 10 and 25 kW to suit batch and molding requirements.<\/span><\/div>\n<\/div>\n<nav aria-label=\"On this product page\" class=\"hc-page-nav\"><a href=\"#hcproduct-benefits\">Advantages<\/a><a href=\"#hcproduct-process\">Preheating process<\/a><a href=\"#hcproduct-fit\">Materials and uses<\/a><a href=\"#hcproduct-specs\">Power selection<\/a><a href=\"#hcproduct-faq\">Buyer questions<\/a><\/nav>\n<section class=\"hc-section hc-product-machine-functions-block\" id=\"hcproduct-benefits\">\n<div class=\"hc-section-heading\">\n<h2>Prepare a better molding charge before it reaches the press<\/h2>\n<\/div>\n<div class=\"hc-benefits\">\n<article class=\"hc-benefit\"><span class=\"hc-benefit-index\">01<\/span><\/p>\n<div>\n<h3>Rotating preforms, improved heat distribution<\/h3>\n<p>Twin rollers turn the cylindrical charge while RF dielectric heating generates heat within the material. This arrangement suits regularly shaped molding preforms and helps distribute heating as the charge rotates.<\/p>\n<\/div>\n<\/article>\n<article class=\"hc-benefit\"><span class=\"hc-benefit-index\">02<\/span><\/p>\n<div>\n<h3>Better flow for consistent molding quality<\/h3>\n<p>Preheating softens the compound before it enters the mold, helping it flow and fill the cavity more readily. This supports consistent quality in electronic and electrical molding operations.<\/p>\n<\/div>\n<\/article>\n<article class=\"hc-benefit\"><span class=\"hc-benefit-index\">03<\/span><\/p>\n<div>\n<h3>Less in-mold heating, better production efficiency<\/h3>\n<p>Moving part of the heating stage outside the mold reduces the heating work left for the molding machine. Preheated charges help connect material preparation with the compression or transfer molding cycle.<\/p>\n<\/div>\n<\/article>\n<article class=\"hc-benefit\"><span class=\"hc-benefit-index\">04<\/span><\/p>\n<div>\n<h3>Timed heating with automatic lid operation<\/h3>\n<p>The lid opens and closes automatically, removing the need for manual lifting. At the end of the selected heating time, RF heating stops and the lid opens for the operator to unload the charge.<\/p>\n<\/div>\n<\/article>\n<\/div>\n<\/section>\n<section class=\"hc-section\" id=\"hcproduct-process\">\n<div class=\"hc-section-heading\">\n<h2>From cylindrical preform to molding charge<\/h2>\n<\/div>\n<div class=\"hc-process-grid\">\n<div class=\"hc-process-copy\">\n<p>Start with cylindrical preforms prepared for your molding charge. Preheat each batch, then transfer it promptly to the compression mold or transfer pot to keep material preparation aligned with the molding cycle.<\/p>\n<\/div>\n<div class=\"hc-video\">\n<div class=\"hc-video-embed\" style=\"position:relative;width:100%;aspect-ratio:4\/3;overflow:hidden;border:1px solid #d5e1de;border-radius:4px;background:#000;\"><iframe src=\"https:\/\/www.youtube.com\/embed\/NP7lFRZ3nWY?rel=0\" title=\"Shared cabinet and automatic lid reference\" width=\"480\" height=\"360\" loading=\"lazy\" referrerpolicy=\"strict-origin-when-cross-origin\" allow=\"accelerometer; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen style=\"position:absolute;inset:0;width:100%;height:100%;border:0;display:block;\"><\/iframe><\/div>\n<p class=\"hc-video-source\"><a class=\"noLightbox\" href=\"https:\/\/www.youtube.com\/watch?v=NP7lFRZ3nWY\" target=\"_blank\" rel=\"noopener\">Watch on YouTube<\/a><\/p>\n<div class=\"hc-video-label\"><span>Shared cabinet and automatic lid reference<\/span><span>01:36<\/span><\/div>\n<p class=\"hc-video-caption\">The video shows the flat-platform preheater for reference to the shared cabinet and lid operation. The roller-electrode version uses twin rollers in the heating area.<\/p>\n<\/div>\n<\/div>\n<div class=\"hc-workflow-grid\">\n<article class=\"hc-workflow-card\">\n<h3>Prepare the preforms and preheat<\/h3>\n<div><strong>Prepare the preforms<\/strong><\/p>\n<p>Prepare cylindrical tablets made in an upstream cold-preforming operation, or use preforms supplied ready-made. Match the charge weight to the subsequent molding shot.<\/p>\n<\/div>\n<div><strong>Load and set the heating time<\/strong><\/p>\n<p>The operator places the preforms in the twin-roller heating area and sets the batch heating time. The lid closes automatically.<\/p>\n<\/div>\n<\/article>\n<article class=\"hc-workflow-card\">\n<h3>Heating stops, then transfer to molding<\/h3>\n<div><strong>Rotate and preheat<\/strong><\/p>\n<p>The preforms rotate on the rollers during RF heating. When the selected time expires, heating stops and the lid opens automatically.<\/p>\n<\/div>\n<div><strong>Unload and transfer to molding<\/strong><\/p>\n<p>The operator removes the heated preforms and transfers them to the compression mold or transfer molding pot. The downstream machine fills the mold, applies pressure and cures the part.<\/p>\n<\/div>\n<\/article>\n<\/div>\n<p class=\"hc-workflow-note\">Time each batch for the next molding charge so heated preforms reach the mold or transfer pot promptly, reducing waiting between operations.<\/p>\n<\/section>\n<section class=\"hc-section hc-product-selection-guide-block\" id=\"hcproduct-fit\">\n<div class=\"hc-section-heading\">\n<h2>Electronic, electrical, motor and automotive molding applications<\/h2>\n<\/div>\n<div class=\"hc-selection-grid\">\n<div class=\"hc-selection-panel\">\n<h3>Electronic encapsulation<\/h3>\n<p>Cylindrical epoxy molding compound (EMC) preforms can be preheated ahead of transfer molding for IC, transistor and discrete electronic component encapsulation. Preheating helps prepare the compound to flow into the package cavity.<\/p>\n<\/div>\n<div class=\"hc-selection-panel\">\n<h3>Electrical switches and insulation<\/h3>\n<p>Phenolic molding compound, also known as Bakelite, is used for switch bodies, connector housings and electrical insulating parts. Roller preheating fits compression or transfer molding lines that use cylindrical preforms.<\/p>\n<\/div>\n<div class=\"hc-selection-panel\">\n<h3>Motor commutator components<\/h3>\n<p>The resin-insulating portion of a motor commutator is an established high-frequency preheating application. Phenolic preforms are heated before loading into the mold for the subsequent molding stage.<\/p>\n<\/div>\n<div class=\"hc-selection-panel\">\n<h3>Automotive phenolic parts<\/h3>\n<p>RF preheating also serves automotive component molding, including phenolic brake pistons and electrical insulators. Where the process uses cylindrical preforms, roller-electrode preheating can be placed ahead of the existing thermoset molding equipment.<\/p>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"hc-section hc-product-model-overview-block\" id=\"hcproduct-specs\">\n<div class=\"hc-section-heading\">\n<h2>Power options for your molding line<\/h2>\n<\/div>\n<div class=\"hc-spec-intro\">\n<p>Choose from 3, 5, 7, 10 and 25 kW power options. Selection considers preform weight, dimensions and quantity per batch, together with the charge requirements of the downstream molding cycle.<\/p>\n<\/div>\n<div class=\"hc-purchase-note\">\n<h3>Start with your compound and preform<\/h3>\n<p>The focus is RF-preheatable phenolic (PF) and epoxy molding compounds supplied as cylindrical preforms that rotate steadily on the rollers. Compound grade, fillers and curing behavior must suit the preheating conditions. Send an existing preform photo, dimensions or material data to Han Chang; we can help match the configuration to your charge size and molding process.<\/p>\n<\/div>\n<p class=\"hc-spec-scope\">Five separate power options are shown below. Selection follows preform dimensions, batch weight and the molding schedule.<\/p>\n<div class=\"hc-power-list\"><div class='avia-data-table-wrap av-av_table-50e186637ed9ed16c605214627a3a44d avia_responsive_table avia-table-1'><table  class='avia-table avia-data-table avia_pricing_default  avia-builder-el-1  avia-builder-el-no-sibling '  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/Table\" ><tbody><tr class=''><td class='avia-highlight-col'>Performance \/ Model<\/td><td class=''>3 kW preheating model<\/td><td class=''>5 kW preheating model<\/td><td class=''>7 kW preheating model<\/td><td class=''>10 kW preheating model<\/td><\/tr><tr class=''><td class='avia-highlight-col'>Performance \/ Model<\/td><td class=''>25 kW preheating model<\/td><td class=''><\/td><td class=''><\/td><td class=''><\/td><\/tr><\/tbody><\/table><\/div><\/div>\n<\/section>\n<section class=\"hc-section hc-product-service-block\">\n<section class=\"hc-product-section hc-service-section\">\n<div class=\"hc-section-heading\">\n<h2>Connect preform heating with your molding process<\/h2>\n<\/div>\n<p>Han Chang can match the preheater to the charge format and downstream compression or transfer molding process. Whether adding a preheater to an existing line or selecting new equipment, the discussion starts with your material and loading routine.<\/p>\n<div class=\"hc-supply-grid\">\n<article class=\"hc-card\">\n<h3>Existing line: add preform preheating<\/h3>\n<p>Locate the machine for convenient unloading and transfer to the mold or transfer pot. Align the arrangement with the existing charging requirements to reduce unnecessary movement and waiting.<\/p>\n<\/article>\n<article class=\"hc-card\">\n<h3>New equipment: select around the compound<\/h3>\n<p>Share the molding compound, preform dimensions and intended parts. Han Chang can discuss roller-electrode preheating alongside suitable molding equipment, connecting material preparation with the downstream process.<\/p>\n<\/article>\n<\/div>\n<div class=\"hc-supply-trust\">\n<h3>Factory-backed customer service and repair support<\/h3>\n<p>Han Chang has factories in Taiwan and mainland China. The mainland factory has dedicated customer service and professional repair departments to support equipment operation and maintenance needs.<\/p>\n<\/div>\n<\/section>\n<\/section>\n<section class=\"hc-section hc-product-faq-block\" id=\"hcproduct-faq\">\n<section class=\"hc-product-section hc-faq-section hc-product-faq\">\n<h2>Roller-electrode HF preheater FAQs<\/h2>\n<details>\n<summary>What does a roller-electrode high-frequency preheater do?<\/summary>\n<p>It uses twin roller electrodes to preheat cylindrical thermoset molding preforms before compression or transfer molding. The heated compound flows more readily into the mold. Principal application areas include electronic encapsulation, electrical insulation and motor components.<\/p>\n<\/details>\n<details>\n<summary>Which industries use it beyond electronics?<\/summary>\n<p>Application areas include electrical switch and connector manufacturing, motor commutator molding, and automotive phenolic components such as brake pistons and electrical insulators. The relevant production route uses cylindrical preforms that are heated before compression or transfer molding.<\/p>\n<\/details>\n<details>\n<summary>Should I choose roller or flat electrodes?<\/summary>\n<p>Start with the shape of the molding charge. Roller electrodes suit regular cylindrical preforms that rotate during heating. Flat electrodes are generally better suited to powder, granules and irregular charges. If your current process heats loose powder in a cup, match the electrode arrangement to that material-handling method.<\/p>\n<\/details>\n<details>\n<summary>Does the preheater make the cylindrical tablets?<\/summary>\n<p>The tablets are prepared before heating, in an upstream cold-preforming operation or by the material supplier. The roller-electrode preheater heats and softens this measured charge. The downstream molding machine then shapes and cures the finished part.<\/p>\n<\/details>\n<details>\n<summary>Do roller electrodes require the compound to be loaded in a container?<\/summary>\n<p>In a typical roller-electrode process, an already formed cylindrical preform is placed in the roller heating area and rotates with the rollers. This differs from cup-loaded powder heating on flat electrodes. The loading arrangement can be matched to the actual preform.<\/p>\n<\/details>\n<details>\n<summary>How are loading, heating and lid operation handled?<\/summary>\n<p>Loading and removal of the heated preforms are manual. Lid opening and closing are automatic. Heating runs for the selected time, then stops as the lid opens automatically so the operator can transfer the charge to the molding machine.<\/p>\n<\/details>\n<details>\n<summary>How do I select the power and request a quotation?<\/summary>\n<p>Han Chang offers 3, 5, 7, 10 and 25 kW power options. Start by sending a product or preform photo, the compound name and details of the existing molding equipment. Available batch weights, preform dimensions and production targets help us recommend a suitable configuration and prepare a quotation.<\/p>\n<\/details>\n<\/section>\n<\/section>\n<section class=\"hc-section\" id=\"hcproduct-related-equipment\">\n<div class=\"hc-section-heading\">\n<h2>Compare preheating and molding equipment<\/h2>\n<\/div>\n<div class=\"hc-related-equipment-grid\">\n<article class=\"hc-related-equipment-card hc-link-card\">\n<div class=\"hc-link-copy\">\n<h3 id=\"hc-related-17788-0-title\">Thermoset Hydraulic Transfer Molding Machine<\/h3>\n<p>A pot-and-plunger system transfers thermoset compound into a closed mold. Discuss transfer molding around your material and insert requirements.<\/p>\n<\/div>\n<p class=\"hc-link-action-wrap\"><a aria-labelledby=\"hc-related-17788-0-title hc-related-17788-0-action\" class=\"hc-link-action\" href=\"https:\/\/hanchang.com.tw\/en\/portfolio-item\/oil-hydraulic-injection-compression-molding-machine\/\"><span id=\"hc-related-17788-0-action\">View machine<\/span> <span aria-hidden=\"true\">\u2192<\/span><\/a><\/p>\n<\/article>\n<article class=\"hc-related-equipment-card hc-link-card\">\n<div class=\"hc-link-copy\">\n<h3 id=\"hc-related-17788-1-title\">High-Frequency Preheater for Melamine Powder<\/h3>\n<p>A flat-platform heating area works with containers for powder preheating. Compare the two arrangements around loose powder or cylindrical preforms.<\/p>\n<\/div>\n<p class=\"hc-link-action-wrap\"><a aria-labelledby=\"hc-related-17788-1-title hc-related-17788-1-action\" class=\"hc-link-action\" href=\"https:\/\/hanchang.com.tw\/en\/portfolio-item\/high-frequency-preheating-machine\/\"><span id=\"hc-related-17788-1-action\">View machine<\/span> <span aria-hidden=\"true\">\u2192<\/span><\/a><\/p>\n<\/article>\n<\/div>\n<p><a class=\"hc-related-series-link\" href=\"https:\/\/hanchang.com.tw\/en\/portfolio_entries\/customized-forming-machine\/\">Explore custom forming machines \u2192<\/a><\/p>\n<style id=\"hc-related-clickable-v1\">#top.postid-17788 #hcproduct-related-equipment .hc-related-equipment-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;align-items:stretch;width:100%;}\n#top.postid-17788 #hcproduct-related-equipment article.hc-link-card{display:flex;flex-direction:column;justify-content:space-between;gap:25px;position:relative;min-width:0;box-sizing:border-box;background:#eff6f4;border:1px solid #aac3be;border-top:4px solid #27675f;border-radius:8px;padding:26px;text-decoration:none;color:#203f45;cursor:pointer;transition:background .15s,border-color .15s,box-shadow .15s;}\n#top.postid-17788 #hcproduct-related-equipment article.hc-link-card h3{margin:13px 0 14px;font-size:24px;line-height:1.35;letter-spacing:-.3px;color:#203f45;text-transform:none;}\n#top.postid-17788 #hcproduct-related-equipment .hc-link-copy>p:not(.hc-related-label){color:#445d60;font-size:17px;line-height:1.7;letter-spacing:normal;margin:0;}\n#top.postid-17788 #hcproduct-related-equipment .hc-link-kicker,#top.postid-17788 #hcproduct-related-equipment article.hc-link-card .hc-related-label{display:block;font-size:11px;line-height:1.5;letter-spacing:1px;font-weight:700;color:#4c7069;margin:0 0 10px;}\n#top.postid-17788 #hcproduct-related-equipment .hc-link-action{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:49px;box-sizing:border-box;background:#205c54;color:#fff;font-size:16px;line-height:1.4;letter-spacing:normal;font-weight:700;border-radius:5px;padding:13px 18px;align-self:stretch;text-decoration:none;}\n#top.postid-17788 #hcproduct-related-equipment .hc-link-action>span[aria-hidden]{font-size:23px;line-height:1;color:inherit;}\n#top.postid-17788 #hcproduct-related-equipment .hc-link-action-wrap{margin:0;}\n#top.postid-17788 #hcproduct-related-equipment .hc-link-action::after{content:\"\";position:absolute;inset:0;border-radius:8px;}\n#top.postid-17788 #hcproduct-related-equipment .hc-link-action:hover{color:#fff;text-decoration:none;}\n#top.postid-17788 #hcproduct-related-equipment article.hc-link-card:focus-within{outline:3px solid #97621a;outline-offset:4px;}\n#top.postid-17788 #hcproduct-related-equipment article.hc-link-card:hover{background:#e4f0ed;border-color:#397c70;box-shadow:0 5px 15px #17483e17;color:#203f45;text-decoration:none;}\n#top.postid-17788 #hcproduct-related-equipment article.hc-link-card:hover .hc-link-action{background:#164b44;color:#fff;}\n#top.postid-17788 #hcproduct-related-equipment article.hc-link-card:focus-visible,#top.postid-17788 #hcproduct-related-equipment .hc-related-series-link:focus-visible{outline:3px solid #97621a;outline-offset:4px;}\n#top.postid-17788 #hcproduct-related-equipment a.hc-related-series-link{display:block;box-sizing:border-box;border:1px solid #aac3be;border-radius:6px;margin-top:22px;padding:18px 22px;color:#205c54;font-size:17px;line-height:1.5;font-weight:700;text-decoration:underline;text-underline-offset:4px;background:#fff;min-height:58px;}\n@media(max-width:650px){#top.postid-17788 #hcproduct-related-equipment .hc-related-equipment-grid{grid-template-columns:minmax(0,1fr);gap:18px;}#top.postid-17788 #hcproduct-related-equipment article.hc-link-card{padding:22px;gap:22px;}#top.postid-17788 #hcproduct-related-equipment article.hc-link-card h3{font-size:22px;}#top.postid-17788 #hcproduct-related-equipment .hc-link-copy>p:not(.hc-related-label){font-size:16px;line-height:1.65;}#top.postid-17788 #hcproduct-related-equipment a.hc-related-series-link{font-size:16px;padding:18px 20px;}}\n@media(prefers-reduced-motion:reduce){#top.postid-17788 #hcproduct-related-equipment article.hc-link-card{transition:none;}}<\/style>\n<\/section>\n<section class=\"hc-product-section hc-rfq-section\" id=\"hcproduct-rfq\">\n<div class=\"hc-section-heading\">\n<h2>Match roller-electrode preheating to your molding process<\/h2>\n<\/div>\n<p>Planning electronic encapsulation, electrical insulation or phenolic component production? Send Han Chang your product photos, preform information or existing molding-machine details to discuss the right preheating power, equipment configuration and quotation.<\/p>\n<div class=\"hc-actions\"><a class=\"hc-btn hc-btn-primary\" href=\"https:\/\/hanchang.com.tw\/en\/contact-us\/\">Request a quotation<\/a><\/div>\n<\/section>\n<p><script type=\"application\/ld+json\">{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What does a roller-electrode high-frequency preheater do?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"It uses twin roller electrodes to preheat cylindrical thermoset molding preforms before compression or transfer molding. The heated compound flows more readily into the mold. 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Available batch weights, preform dimensions and production targets help us recommend a suitable configuration and prepare a quotation.\"}}]}<\/script><script type=\"application\/ld+json\">{\"@context\": \"https:\/\/schema.org\", \"@type\": \"VideoObject\", \"name\": \"Shared cabinet and automatic lid reference\", \"description\": \"The video shows the flat-platform preheater for reference to the shared cabinet and lid operation. The roller-electrode version uses twin rollers in the heating area.\", \"thumbnailUrl\": \"https:\/\/img.youtube.com\/vi\/NP7lFRZ3nWY\/hqdefault.jpg\", \"embedUrl\": \"https:\/\/www.youtube.com\/embed\/NP7lFRZ3nWY\", \"uploadDate\": \"2026-09-07T03:01:09-07:00\", \"duration\": \"PT96S\"}<\/script><\/div>\n<\/div><\/section>\n","protected":false},"excerpt":{"rendered":"<p>Han Chang\u2019s roller-electrode high-frequency preheater prepares cylindrical phenolic and epoxy molding preforms for compression or transfer molding. Twin roller electrodes rotate the charge during RF preheating, helping improve material flow, production efficiency and consistent molding quality. Applications center on electronic encapsulation, electrical insulation and motor components.<\/p>\n","protected":false},"author":5,"featured_media":4614,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"tags":[],"portfolio_entries":[81],"class_list":["post-17788","portfolio","type-portfolio","status-publish","has-post-thumbnail","hentry","portfolio_entries-customized-forming-machine"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.0 (Yoast SEO v28.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Roller-Electrode High-Frequency Preheater | Han Chang<\/title>\n<meta name=\"description\" content=\"Preheat cylindrical phenolic and epoxy molding preforms with Han Chang\u2019s twin-roller RF preheater. 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