{"id":7266,"date":"2025-06-09T17:50:29","date_gmt":"2025-06-09T09:50:29","guid":{"rendered":"https:\/\/rilong-mold.com\/?p=7266"},"modified":"2026-07-27T10:11:12","modified_gmt":"2026-07-27T02:11:12","slug":"our-experiences-in-glass-filled-nylon-injection-molding-and-mold-design-for-long-glass-fiber-high-wear-materials","status":"publish","type":"post","link":"https:\/\/rilong-mold.com\/es\/our-experiences-in-glass-filled-nylon-injection-molding-and-mold-design-for-long-glass-fiber-high-wear-materials\/","title":{"rendered":"Our experiences in Glass-filled Nylon injection molding and mold design for long glass fiber\/high-wear materials."},"content":{"rendered":"

Glass-filled nylon molding:<\/strong> This article explains the key design, material, process, quality, and production considerations that engineers and sourcing teams should evaluate.<\/p>\n\n\n\n

In the field of engineering plastics, nylon 66 (PA66) with 30% glass fiber (GF) is a widely used high-performance material known for its excellent mechanical strength, heat resistance, and dimensional stability. However, due to its high wear characteristics, mold design and injection molding processes require special attention.<\/p>\n\n\n\n

\"\"
PA66 with 35GF<\/figcaption><\/figure>\n\n\n\n
\n

Characteristics and Challenges of PA66 + 30% GF Material<\/strong><\/p>\n<\/blockquote>\n\n\n\n

The main advantages of PA66+30GF include:<\/p>\n\n\n\n

High Strength & Rigidity: Glass fiber reinforcement significantly increases tensile and bending strength.<\/p>\n\n\n\n

Heat Resistance: Short-term temperature tolerance up to 250\u00b0C, long-term usage temperature between 150-160\u00b0C.<\/p>\n\n\n\n

Dimensional Stability: Glass fiber reduces shrinkage and minimizes deformation risk.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n
\n

However, this material also presents some challenges:<\/strong><\/p>\n<\/blockquote>\n\n\n\n

High Wearability: Glass fiber accelerates mold wear, causing issues such as surface roughening and flash.<\/p>\n\n\n\n

Reduced Fluidity: The presence of 30% GF decreases melt fluidity, affecting filling efficiency.<\/p>\n\n\n\n

Mold Corrosion: PA66 itself has acidic properties, and glass fiber further exacerbates mold corrosion.<\/p>\n\n\n\n

The following brands of nylon and glass-filled nylon materials we worked are:<\/p>\n\n\n\n

Zytel\u00aePA66 70G30HSLR<\/p>\n\n\n\n

Ultramid\u00ae PA66 A3EG6<\/p>\n\n\n\n

Amilan\u2122PA66 CM3004G-30<\/p>\n\n\n\n

Ascend Vydyne\u00ae R530H<\/p>\n\n\n\n

DSM-K-FKGS6_B PA6-GF30 FR(17)<\/p>\n\n\n\n

The table below displays the performance characteristics of glass-filled polyamide composites (Nylon 66 with 30% glass fibers).<\/p>\n\n\n\n

\"\"
Nylon 66 with 30% glass fibers<\/figcaption><\/figure>\n\n\n\n
\"\"
Mold DFM<\/figcaption><\/figure>\n\n\n\n
\n

Key Points in Mold Design for High-Wear Materials<\/strong><\/p>\n<\/blockquote>\n\n\n\n

(1) Selection of Mold Steel<\/strong><\/p>\n\n\n\n

Corrosion Resistance & High Hardness: Recommended mold steels include 2316, 420\uff0c2083, SKD61 for corrosion resistance.<\/p>\n\n\n\n

Heat Treatment Requirements: A hardness of HRC 52+ can reduce wear, but long-term use still requires optimized surface treatment (such as chrome plating or nitriding).<\/p>\n\n\n\n

\"\"
Injection mold<\/figcaption><\/figure>\n\n\n\n

(2) Optimization of Runner and Gate Design<\/strong><\/p>\n\n\n\n

Avoid Sharp Corners: Reduce glass fiber erosion on the mold.<\/p>\n\n\n\n

Multiple Gates: Minimize warpage caused by fiber orientation (using three gates can reduce warpage by 56%).<\/p>\n\n\n\n

(3) Reinforcement of Ejection System<\/p>\n\n\n\n

Due to the high demolding force of PA66+30GF, more ejector pins or hydraulic ejection systems should be used.<\/p>\n\n\n\n

\"\"
PA6+GF30 over-molded with diecasting part Front<\/figcaption><\/figure>\n\n\n\n

3. Optimization of Injection Molding Process<\/strong><\/p>\n\n\n\n

Melt Temperature: 280-300\u00b0C to ensure proper dispersion of glass fibers.<\/p>\n\n\n\n

Mold Temperature: 80-120\u00b0C to reduce internal stress.<\/p>\n\n\n\n

Hold Pressure: Increase appropriately to minimize shrinkage, but too high may cause flash.<\/p>\n\n\n\n

\"\"
Injection molding of Nylon product<\/figcaption><\/figure>\n\n\n\n

4. Special Considerations for Long Glass Fiber Reinforced Materials (LFT)<\/strong><\/p>\n\n\n\n

Long glass fibers (>5mm) provide higher impact strength but have lower fluidity, requiring careful mold design:<\/p>\n\n\n\n

Prevent Fiber Breakage: Use low-shear runner designs.<\/p>\n\n\n\n

Mold Surface Polishing: Reduce fiber abrasion on the cavity.<\/p>\n\n\n\n

\"\"
high impact resistance GF filled Nylon injection molding<\/figcaption><\/figure>\n\n\n\n

<\/p>\n\n\n\n

Related capability:<\/strong> Explore Rilong\u2019s mold design and tooling capabilities<\/a>, or send your drawing and production requirements for a technical review.<\/p>","protected":false},"excerpt":{"rendered":"

Glass-filled nylon molding: This article explains the key design, material, process, quality, and production considerations that engineers and sourcing teams should evaluate. In the field of engineering plastics, nylon 66 (PA66) with 30% glass fiber (GF) is a widely used high-performance material known for its excellent mechanical strength, heat resistance, and dimensional stability. However, due […]<\/p>\n","protected":false},"author":4,"featured_media":7268,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_gspb_post_css":"","kk_blocks_editor_width":"","_kiokenblocks_attr":"","_kiokenblocks_dimensions":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-7266","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/rilong-mold.com\/es\/wp-json\/wp\/v2\/posts\/7266","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rilong-mold.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rilong-mold.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rilong-mold.com\/es\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/rilong-mold.com\/es\/wp-json\/wp\/v2\/comments?post=7266"}],"version-history":[{"count":1,"href":"https:\/\/rilong-mold.com\/es\/wp-json\/wp\/v2\/posts\/7266\/revisions"}],"predecessor-version":[{"id":7998,"href":"https:\/\/rilong-mold.com\/es\/wp-json\/wp\/v2\/posts\/7266\/revisions\/7998"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/rilong-mold.com\/es\/wp-json\/wp\/v2\/media\/7268"}],"wp:attachment":[{"href":"https:\/\/rilong-mold.com\/es\/wp-json\/wp\/v2\/media?parent=7266"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rilong-mold.com\/es\/wp-json\/wp\/v2\/categories?post=7266"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rilong-mold.com\/es\/wp-json\/wp\/v2\/tags?post=7266"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}