• Injection mold gate type and selection-6
    2020-10-14
    2.2.8 Ring gate The annular gate is arranged on the outside concentric with the cylindrical cavity, that is, gates are arranged around the cavity, so it can be called an outer annular gate, and its gate position corresponds exactly to the inner disc gate . Suitable for thin-walled and long-tube plastic parts. Because the melt of the plastic part evenly enters the cavity around the core, the mold i...
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  • Fire protector PP material
    2020-10-14
    Flame retardant and fireproof PP plastic, why does the sticking phenomenon occur during injection molding? After high-temperature dissolution, high-speed and high-pressure filling in the cavity during the injection, the addition of flame retardant and auxiliary in the flame-retardant fire-retardant PP,  if the mold has a large amount of material and the exhaust is insufficient, The gas will a...
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  • Injection mold wants to do well: must grasp five injection schedules
    2020-09-30
    On the premise of ensuring product quality, the shorter the cycle time is, the higher the cycle time. The cycle time includes the following items: injection time, pressure holding time, melting time, cooling time, ejection time, mold clamping low pressure time, and even more The time factor is also related to mold opening and clamping, and the speed of ejection. 1. Injection time Including the hol...
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  • What is double shot mold?
    2020-09-30
    Double Injection Mold is also called Two Color Mold. That's two different materials or two color materials injected in one injection machine, injected by twice, but the product only comes out one shot from the mold. This mold technology is called double material injection, usually finished by one set mold, and it needs special two color injection molding machine to produce the products. Double inj...
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  • Injection mold gate type and selection-5
    2020-09-21
    .2.5 Fan gate Fan-shaped gate is a gradually expanded gate, which is a variant of side gate, and  used to form large-width plate-shaped plastic parts. The gate gradually widens along the feed direction, and the thickness is gradually reduced to the thinnest. The plastic melt is uniformly distributed in the width direction, which can reduce the internal stress of the plastic part and reduce th...
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  • Plastic product surface treatment process-painting
    2020-09-21
    Plastic product surface treatment process types: silk screen, pad printing, painting, electroplating, hot stamping, laser carving, water transfer printing, etc. The purpose for painting are improving appearance and functions, such as friction resistance, corrosion resistance, radiation resistance, acid and alkali resistance, fire resistance, increased strength, etc. The main painting processing ar...
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  • Injection mold gate type and selection-4
    2020-09-04
    2.2.3 Side gate The side gate is also called the edge gate, which is generally opened on the parting surface and feeds from the outer side of the cavity (plastic part). The side gate is a typical rectangular cross-section gate, which can easily adjust the shear rate and gate closing time during mold filling, so it is also called a standard gate. The side gate is characterized by simple gate cross-...
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  • What are the precautions for mold polishing?
    2020-09-04
    Mold polishing has two purposes; one is to increase the smoothness of the mold, so that the surface of the product from the mold is smooth and beautiful, and the other is to make the mold easy to release, so that the plastic will not be stuck on the mold and cannot be taken off. Mastering a reasonable polishing method can improve the quality and service life of the mold, thereby improving product ...
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  • How many you know about the ultrasonic plastic welding ?
    2020-09-21
    How many you know about the ultrasonic plastic welding? Plastic welding refers to the method of heating the contact surface of two plastic parts to melt at the same time, so that they are combined into a whole connection method, only applicable to the thermoplastic joint welding, we can use electrode or not use electrode. When using the welding rod, the end face of the welding end shall be made in...
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