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A Brief Introduction to Carbon Fiber Reinforced PPS
2025-11-10
Long Carbon Fiber Reinforced PPS High-performance thermoplastic composites can replace metals. Although PEEK is regarded as the benchmark for engineering performance, reinforced PPS offers a truly cost-effective alternative. The demand for engineering thermoplastics such as PC and high-performance thermoplastics like PEEK is steadily increasing in industrial applications. These materials, when pro...
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Customer Project: PA6-LGF40 Solution for Aluminum Cutting Machine
2025-10-28
Customer Project: PA6-LGF40 Solution for Aluminum Cutting Machine body { font-family: 'Inter', sans-serif; line-height: 1.8; color: #333; background-color: #fff; margin: 0; padding: 0; } .container { max-width: 920px; margin: 0 auto; padding: 50px 24px; } h1, h2 { color: #00924f; transition: all 0.3s ease; font-weight: 700; margin-top: 2em; margin-bottom: 0.8em; } h1:hover, h2:hover { color: #006f...
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Injection Molding Defects and Solutions -- Whitening
2025-10-20
Whitening (Stress Whitening): During demolding, excessive ejection force is applied to the surface areas around ejector pins or grooves. Due to forced demolding, high internal stress develops in these regions, sometimes causing deformation. Whitening is a sign of stress cracking. Materials such as ABS and HIPS are particularly prone to this phenomenon.
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Injection Molding Defects and Solutions -- Stains
2025-10-20
Stains, Impurities, and Foreign Substances The plastic material is impure or contaminated. 23.1 Causes 23.2 Solutions 23.1.1 Raw materials, pellets, or pigments are impure. 23.2.1 Replace the raw materials, dyes, or pigments. 23.1.2 The plastic has decomposed or deteriorated. 23.2.2 Adjust the processing conditions to prevent material decomposition. 23.1.3 The barrel and hopper are not clean. 23.2...
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Injection Molding Defects and Solutions -- Poor Transparency
2025-10-20
Poor Transparency: Due to poor contact between the molten material and the mold surface, tiny pits appear on the surface of the molded part, causing light scattering. Alternatively, the mold surface may not be sufficiently polished, resulting in decreased or uneven transparency in transparent products. 22.1 Causes 22.2 Solutions 22.1.1 Low mold temperature or low material temperature, causing poor...
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Injection Molding Defects and Solutions -- Dull Surface
2025-10-20
Dull Surface (Lack of Gloss): Due to poor mold surface finish, inadequate contact between the molten material and the mold surface, or improper material and mold temperatures, the molded product fails to exhibit the natural gloss of the resin. Instead, the surface appears whitish, cloudy, or dull. 21.1 Causes 21.2 Solutions 21.1.1 Poor mold surface finish; presence of scratches, moisture, or oil c...
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Injection Molding Defects and Solutions -- Unmelted Lumps
2025-10-20
Cold Slugs / Unmelted Lumps: Unmelted or insufficiently plasticized material enters the mold cavity along with the melt flow, causing hard plastic lumps to become embedded inside or on the surface of the molded part. 20.1 Causes 20.2 Solutions 20.1.1 Material temperature, mold temperature, and nozzle temperature are too low, or injection speed is too slow. 20.2.1 Properly increase the material, mo...
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Injection Molding Defects and Solutions -- Gate Sticking
2025-10-20
Gate Sticking: The gate sticks in the gate sleeve due to mechanical resistance inside the sleeve, insufficient cooling, or a malfunction of the pull pin. 19.1 Causes 19.2 Solutions 19.1.1 Insufficient runner draft angle, no mold release agent used. 19.2.1 Increase the runner draft angle and apply mold release agent appropriately. 19.1.2 Cooling time too short, nozzle and fixed mold temperatures to...
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Injection Molding Defects and Solutions -- Plastic Brittleness
2025-10-20
Plastic Brittleness: Due to poor plastic properties, obvious orientation, high internal stress, and poor structural design of the plastic part, the strength decreases, making it prone to cracking (especially along the flow direction of the material). 18.1 Causes 18.2 Solutions 18.1.1 Material degradation, depolymerization, hydrolysis, or poor-quality pigment (e.g. deterioration). 18.2.1 Replace ra...
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