The basic principle of fusible core injection molding is to first cast a fusible core using a low melting point alloy, then put the fusible core into the mold as an insert for injection molding...
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In the manufacture of molds, mold exhaust is a very important part. Mold exhaust can represent the overall structure of the mold to the greatest extent.Even if the excellent mold is without good exhaust...
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Advantages, Shortened cycle time, The cycle time is shortened because there is no limitation on the cooling time of the sprue system, so the part can be ejected in time after it is formed and cured...
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Therefore, how to ensure the normal and stable operation of injection machines in continuous production is a problem worthy of attention and effort for both injection machine manufacturers and users.
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Therefore, how to ensure the normal and stable operation of injection machines in continuous production is a problem worthy of attention and effort for both injection machine manufacturers and users.
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With the wide application of plastic products, such as daily chemical products and beverage packaging containers, the appearance needs often require the surface of plastic mold cavities to reach the degree of mirror polishing.
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Introduction,Except for the main flow gate, most of the gates are the smallest part of the pouring system, with a cross-sectional area of only 3% to 9% of the cross-sectional area of the manifold.
(1) the injection nozzle hole is too large to cause the melt material reflux and shrinkage, too small resistance to a large amount of material is not enough to appear shrinkage.
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PVC is a heat-sensitive material, its injection molding process is poor, the reason is that too high a melt temperature or too long a heat time can easily make PVC decomposition, so controlling the melting temperature is the key to injection molding PVC p
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1）Viscosity curve,The viscosity curve is made to select a suitable injection speed that will not cause large changes in melt viscosity when there are small fluctuations in each parameter. The fluctuation between each mold should be as small as possible to
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1. Cavity arrangement. The number of cavities and their arrangement are determined according to the geometric structure characteristics of plastic parts, dimensional accuracy requirements, batch size, ease of mold manufacturing, mold cost, etc...
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1: What is laser welding? A: Laser welding is an efficient and precise welding method that uses a high-energy-density laser beam as a heat source.
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The barrel and the screw make up the extrusion system. Like the screw, the barrel works under high pressure, high temperature, severe wear and tear, and certain corrosion conditions.
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For an injection molding factory, the energy consumption occupied by the injection molding process accounts for about 60%, thus effectively reducing the energy consumption of the injection molding machine is an important way to save energy in the injectio
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1、Commonly used plastic engineering materials and shrinkage rate?ABS: 0.5% (super unbreakable glue),PC : 0.5% (bulletproof glass glue),PMMa ：0.5%: (plexiglass),PE ：2% polyethylene
What is the main flow channel sticking to the mold (appearance), Main runner residue is a phenomenon that the main runner of molded products fails to break away from the mold.
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In the work of the mold, in addition to the requirement that the substrate has a reasonable match of high enough strength and toughness, its surface properties are crucial to the working performance and service life of the mould.
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As we all know, the details determine success or failure, the best materials, even if you do not master a good detail, will be a loss. Especially fibrous PC plastic materials, in the injection molding modification process, must pay attention to the detail
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Before assembly, you should carefully study and analyze the general assembly drawing. Parts diagram, to understand the role of each part, characteristics and its technical requirements, to determine the assembly benchmark.
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1. Filling modification, Method: Resin + coupling agent + inorganic minerals,Commonly used materials.
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PC/ABS co-mingled gold
Improved performance: improved low-temperature impact performance, improved processing fluidity, improved impact resistance, enhanced heat stability of ABS
Insert molding refers to the molding method in which the mold is filled with pre-prepared inserts of different materials and then injected with resin, and the molten materials are joined with the inserts and cured to make integrated products.
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1. Injection molding machine
A). Excessive heating of plastic in the injection cylinder.
Lower the melt temperature.
The most important process conditions in the injection process are the temperature, pressure, speed, and the corresponding individual action time that affect the plasticizing flow and cooling.
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For hygroscopic materials (such as nylon), high resin moisture content can also cause screw slippage. Improper drying can significantly reduce the viscosity of the material and cause the phenomenon of air-packed material in the screw, thus reducing the co
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