2014年2月26日星期三

MASTER plastic rattan garden furniture Forging die steel

Forging die steel. Generally speaking, there are two steel forging die more prominent role under the impact load when one is working. Therefore, the higher the mechanical properties of the steel requirements, especially for plastic deformation resistance and toughness demanding; Second, the larger cross-sectional dimensions MASTER china plastic injection molding  die (<400mm) so the steel hardenability requirements higher to ensure that the entire die uniform microstructure and properties. Common hammer forging steel floor there 5CrNiMo, 5CrMnMo, 5CrNiW, 5CrNiTi and 5CrMnMoSiV so on. Different types of hammer eye mode should be used in different materials. MASTER plastic drawer mold For large or large hammer forging die to 5CrNiMo as well. Can also be used 5CrNiTi, 5CrNiW or 5CrMnMoSi like. For small and medium forging die steel usually used 5CrMnMO.

2014年2月19日星期三

Meter box enclosure design

The above advantages of the new cable branch box are derived from fiber reinforced polyester material itself. Also in the box design also gives this new branch cable boxes Unlike many metal boxwheel covers molding features: 1, with ventilation components for tank ventilation to prevent excessive distilled water Between the cabinet door, the upper and lower back, roof, doors and the rear plate have a vent assembly, the heat generated by the electrical components may be made ??of the space cabinets dehumidification process, can prevent metal cabinets pieces of rust, but also prevents the leakage current occurs. 2, isolated soil moisture Cable branch reaction injection mouldingbox with the base, by filling in the base and the base buried in the sand a certain depth below the surface, so that the soil moisture does not rise into the cabinets. 3, modular design makes installation easy Modular design not only makes easy to install, and very easy to replace the cabinet parts, simplifying spare custody.

Meter box box material

This composite material consists of two components: a substrate - a polyester-based resin; reinforcing material (abbreviated PC, SMC), which is so called transparent PC material, fiber Water purifier molding reinforced polyester material. PC transparent material, fiber-reinforced unsaturated polyester is an unsaturated polyester resin matrix composite material. Such insoluble both materials, flame retardant recyclable characteristics, the latter does not melt the material having the drawbacks thin wall injection moldingof non-recyclable three-dimensional structure of the physical network structure, four materials modified by the functional filler and reinforcing fibers have special become a high-performance engineering materials.
In Europe and other developed countries decades ago this material was widely used in the electrical field.

2014年2月17日星期一

Metal mold cavity surface thermal fatigue

Cavity surface metal thermal fatigue ( cracking ) . Hot mold work is characterized by intermittent . After each state of the metal forming the hot water to be cooled cavity surface oil, air and other media. Therefore . Hot mold working condition is repeated heating and cooling , so that the surface of the metal mold cavity to produce plastic container moldingthermal expansion and contraction , which repeatedly subjected to tensile and compressive stress . As a result, the cavity caused by surface cracks , called thermal fatigue phenomenon whereby hot die steel made for second basic performance requirements. That has a high thermal fatigue resistance . In general, the factors affecting the thermal fatigue resistance of steel are mainly : ① steel thermal conductivity. The high thermal conductivity of steel , a metal mold can reduce the degree of surface heating , thereby reducing the tendency of the steel to thermal fatigue . Thermalconductivity is generally believed that the amount of carbon steel and cooperation related to the high china plastic injection moldingthermal conductivity when the carbon content is low, it should not be hot die steel with high carbon steel. Commonly used in the production of carbon steel (C0.3% 5 ~ 0.6%) combined carbon content is too low. Causes decrease in the hardness and strength of steel .Isdisadvantageous.Critical point ② Steel. The critical point is usually steel (Acl) is higher. The lower steel thermal fatigue bias. Therefore . Usually by adding alloying elements Cr, W, Si, attracted improve the critical point of the steel. Thereby improving the thermal fatigue resistance of steel.

2014年2月12日星期三

The main structure of the mold design and fabrication

The experimental design and manufacture a set with heating, cooling, vacuum pumping microinjection molding Babyplast mold structure , the experiment used 6 / 10 micro- injection molding machine comes with mold . Micro injection molding mold body structure compared to conventional injection molding dies , there are many unique features, such as: smallCustom injection moulding  cavity size , specific surface area increases ; melt flowing through microfluidic channels , when the cavity condensation speed, easily lead fill incomplete , require high mold temperature. Standard mold temperature is generally set 20 ~ 50 ℃,, microinjection molding and mold temperature of up to 60 ~ 180 ℃. In order to meet the requirements of high mold temperature , while maximizing the heating rate , the use of electric heating rods . Thermocouple ( iron / constantan ) , the internal electric rods (6mm) Injection mold maker and micro- injection molding machine control software thermostat system . Such a high mold temperature, natural cooling is bound to increase the production cycle , so a multi-channel water cooling .Micro injection molding mold cavity mostly blind hole miniature structure and high precision machining and cooperation , relying on traditional parting surface ,Structural gap has been unable to fully exhaust . If the cavity where the gas can not be discharged , will cause hot spots , lack of filling defects , for setting the path and the corresponding vacuum seal structure . In addition , due to the small size of micro parts , light weight , thin wall , the top of the inappropriate use of conventional mechanical ejector , which uses suction device to complete the release of micro parts .

2014年2月11日星期二

Implement proper casting die casting operation should work after training of qualified job

Implement proper casting die casting operation should work after training of qualified job⑴, strict implementation of the die-casting work rules, strict control of the first die times the cycle time , the error should be less than 10%. Stable casting cycle time , for a casting plant overall efficiency is essential. Stability of product quality , mold life , the failure rate has a decisive influence .⑵, strict implementation of the mold cooling solution , cooling the mold is to improve production efficiency , the quality of castings , die life , and effective Crate mold for reducing mold failures. However, the error of the water cooling operation will die causing fatal injuries . Stop casting production , cooling water must be shut down immediately .⑶, pouring columns written Tan , scoop aluminum, cast columns action norms , do not contain the liquid metal scoop into the oxide scale , pouring liquid metal into the pressurechamber of the least volatile. Manually poured into the pouring amount of error control within 2-3 %.⑷, clean Custom plastic mold promptly remove accumulates in the sub -surface , cavity, core , runner , overflow tank , exhaust , etc. The metal Shaw Road fouling to prevent mold when the mold surface collapsed , blocking the exhaust path , or cause mold lax. When prohibit the use of clean mold tool steel forming the contact surface .⑸, spray coating is the most important , one of the largest die-casting operation difficulty , must strictly follow the spraying operation. Incorrect spraying causes damage to the product quality is unstable and die Injection mold maker deadlines.⑹, as required in a timely manner to lubricate sliding parts .⑺, pay attention to the tightness of the mold , always check the situation and die mold clamping plate bracket support cases, prevent the use of a mold to sink or fall.⑻, complete a second mold maintenance cycle mode , or after the completion of the production volume required to stop production , to keep the last die-casting products ( preferably with water , exhaust system ) , together with the mold repair .