The main properties of plastic products

The main properties of plastic products

Plastics is made from plastic as main raw materials processing of living supplies, industrial supplies.

Compared with other materials, plastic has the performance characteristics of the following aspects:

1. Light weight plastic is lighter material, relative density distribution is between 0.90 2.2. Obviously, the plastic can float to the surface of the water? Foamed plastics, in particular, because there a microporous, quality of a material is lighter, relative density 0.01. This makes the plastic can be used to reduce the weight of the product production.

2. Excellent chemical stability The vast majority of plastic of acid, alkali and other chemicals have good corrosion resistance. Especially commonly known as king plastic for ptfe (F4), its chemical stability is better than gold, even in the "aqua regia" boiled over ten hours also can't bad. Because the F4 has excellent chemical stability, is the ideal of corrosion resistant material. Such as F4 transport corrosive and viscous liquid can be used as the material.

3. The excellent electrical insulation properties Common plastic is a poor conductor of electricity, its surface resistance and volume resistance is very big, with Numbers of up to 109 a 1018 ohms. The breakdown voltage, dielectric loss Angle tangent value is very small. As a result, the plastic in the electronic industry and mechanical industry has been widely used. Such as plastic insulated control cables.

4. A poor conductor of heat, with noise elimination and damping effect Generally speaking, the thermal conductivity of the plastic is relatively low, quite steel 1/75-1/225, the microporous foam contains gas, its better heat insulation, sound insulation, shockproof sex. Such as polyvinyl chloride (PVC) thermal conductivity was only about 1/357 of the steel, aluminum 1/1250. On insulating ability, single glass window plastic is 40% higher than the single glass window aluminum, 50% higher than double glass. Will be combined with hollow glass, plastic form used in residential, office, room, hotel, save central heating in the winter and summer air conditioning saving costs, benefits obviously.

5. Wide distribution and high mechanical strength than strength Some plastic as hard as a stone, steel, and some soft such as paper, leather; From the plastic hardness, tensile strength, elongation and impact strength mechanical properties, such as wide distribution, there is a lot of use of choice. Because of the proportion of plastic small, strength, and thus has high specific strength. Compared with other materials, plastic also exists obvious shortcoming, such as easy burning, high stiffness than metal, aging resistance is poor, no heat, etc.

How to achieve efficient tooling and product quality control

Contemporary mold manufacturing industry is developing rapidly, the same rapid development as well as mold industry market competition. Under the requirements of the processing cycle shortened to lower the cost of the case, the accuracy requirements rise, not fall, so except in the case of funds, to maximize production capacity and processing equipment, quality control and efficient means of getting mold manufacturing enterprises to become can the key to winning the competition.

With the development of mold manufacturing, mold and product quality measurement and control is very important. My company from the early mold design involved in digital mapping, mold machining process measurement, repair mode measurements, to mold inspection measurement and post-mold repair measure; and product tryout, production, testing; from electronics small size mold the large car class molds and large molds aerospace industry measurement, quality testing mold used in measurement equipment, including the classic fixed high-precision coordinate measuring machine is not only, but also covers the projector and other equipment.

Cengcengbaguan mold quality, cutting-edge products using industry CPK (Complex Process Capability index acronym is used to represent the modern enterprise process capability index. Process capability is the maximum allowable ratio of process performance and process variation range of normal variation) management system to ensure product quality! Efficient mold, product quality control. About Our specific quality testing and use of the program, please refer to https://www.facebook.com/cnmoulding CPK or visit our website www.chinamoldmaker.org  www.injectionmoldchina.com!

Hot runner mold

Hot runner is used in the injection mold,melted plastics injected into the mold cavity heated component in thecollection. Hot runner mold is the use of heating devices so that the manifoldis always the solidification of the melt mold. Because it is shorter than thetraditional mould forming period, but also saves raw materials, therefore hotrunner mold in today's industrialized countries and regions of the world havebeen extremely wide range of applications.

In General, hot runner system of hot runnersystem into a single, long hot runner system and valve gate hot runner system.From the hot nozzle, manifold, temperature-controlled boxes and accessoriesconsists of.

Because the hot runner mold not runnersystem cooling time restrictions, makes curing immediately after setting out.Many hot runner mold production of thin-walled parts the cycle time can be 5seconds. And economical plastic is expected to reduce reject rate, improveproduct quality, eliminate the follow-up process, in favour of productionautomation and so on. Industry in the world more developed countries andregions of hot runner mold production is extremely active, hot runner moldproduction ratio continues to increase. Heat flow to China is still in itsinfancy, but is growing rapidly, significantly improve the quality of the die.

We are professional manufacturer of plasticinjection mould, by the rich experience in the hot runner mold make, thecompany uses hot runner brand Liu Dao (Korea), sharp (Korea), DME (UnitedStates), INCOE (United States), MOLD-MASTER (Canada---runner boss), HUSKY(Canada), SM (plastic-US-China). For more information, please see https://www.facebook.com/cnmouldingor  http://www.injectionmoldchina.com/MoldsTooling/Injection-Molds-Terminology/#h7  hope can provide some help for you!

Search engine

Baidu Google Google.com and Baidu.com is one of the search engines as we know it is the world's largest Chinese search engine

Baidu informative, wide, has been committed to let users more easily get information, find the order. But the biggest disadvantage is that updating is slow, some Internet users reflect information that Baidu has been nearly a year without updates, rapid development in information today, Baidu is criticized by the majority of Internet users.

With the corresponding Google, Google is currently recognized as the world's largest search engine, and it provides easy to use free service. With powerful search capabilities, to find potential customers, understand competitors and provide a strong support. And can be submitted through the Web site, product, update business information, and blogging, such as the soft article is Google indexed. Google truly free, fair and free.

As represented by the Google search engine as a website marketing strategy, is the development trend of the future.

We specializing in plastic injection molds, for more information, please visit our website at www.cnmoulding.com  www.injectionmolddchina.com

injection molding

Most industrial and agricultural plastic parts by injection molding, the plastic itself has such a high design accuracy, the use of special engineering plastics processing, can not be used in these conventional plastic injection molding, but must be precision injection molding technology. In order to ensure the performance of these precision plastic parts, quality and reliability and stability of long-term use, the injection molding of high quality, in line with the requirements of the product design of plastic products, must, injection molding equipment and mold design and injection molding of plastic materials and injection molding process on-site management improvement. 

We usually say is the precision injection molding precision injection molded shape should meet strict dimensional tolerances, geometric tolerances and surface roughness. To be precise injection must have many related conditions, and the most essential is a plastic material, injection mold, injection molding process and injection equipment which four fundamental factors. 

When the design of plastic products, plastic materials should be selected first, and plastic injection molding and precision can be selected high mechanical properties, dimensional stability, good creep resistance, resistance to environmental stress cracking of the material. Second, the selection should be based on plastic material, the dimensional accuracy of the finished product, the piece weight, and the quality requirements of the desired mold structure selected suitable injection molding machine. In the process, the factors affecting precision injection molding products, mainly from the aspect of the mold temperature, injection molding process control, as well as the ambient temperature and humidity changes of the magnitude of the production site and the acquired products annealing treatment. 

On precision injection molding, the mold is one of the keys to achieve the required quality, precision plastic products, precision injection molds should earnestly comply with the product size, accuracy and shape requirements, mold material should be strictly selected. But even if the precision of the mold, uniform size, the actual size of the molded plastic article will be inconsistent due to shrinkage differences. Therefore, effective control of shrinkage of plastic products is very important in precision injection molding technology. 

Our company has ten years of production experience in the field of injection molding, focusing on a variety of precision injection mold development and production! More information can be https://www.facebook.com/cnmoulding or visit our website www.cnmoulding.com www.injectionmoldchina.com! I hope to provide some help for you!

China injection molding and plastic mold making industry hard

From China’s income situation difficult to see Chinese private enterprises, including ours plastic injection molding industry,The U.S. has 70% of the injection molding industry to move back, and if China plastic mold injection molding industry to continue to survive, to break the monopoly of state-owned enterprises is inevitable.

Chinese household financial investigation and Research Center data show that “the financial industry, utilities, real estate is the highest level of annual wage income of three industries, other industries typically 1.9 to 2.6 times.” Investigation of the center come from different ownership enterprises wages of view, state-owned enterprises, the average wage level of 54,000, only 29,000 private enterprises, state-owned enterprises is the private sector average wage level is about 1.9 times. The average wage income of foreign companies is as high as 86,000.

“State-owned monopoly industries due to hold the telecommunications, electricity, energy, high-value resources, it was easier profitable addition to pay state taxes, as well as considerable profit retention by allowing for the issuance of employee benefits or develop shopping malls, resorts, hotels and other sideline; The relative crowding together in the competitive private manufacturing, consumer goods, foreign trade and other fields. junior staff the income gap between the two conservative estimate of about 2 times. “Zou Wenjiang said.

Analysis of state-owned enterprises pay system is not difficult to find, in addition to employees of state enterprises fundamental wage income, but also includes wages of hidden income, such as a variety of bonuses, subsidies, insurance, prepaid cards, in-kind and other benefits. Industry insiders estimate that this part of the income of employees of state enterprises accounts for about half of total revenue.

Chinese household financial investigation and research center director, dean of Southwest University of Finance and Economics plow willing to accept new financial reporter in an interview that, according to various sources of income contribution to income inequality perspective, wage income gap is caused by China’s current income uneven distribution of one of the main income gap on the overall contribution rate of 40 percent. Followed by the industrial and commercial income disparities, income up 20% of households with an average income of 22,000 yuan business, the average household income of the lowest 20% Business operating income of only 200 yuan. Typically, the main source of income of low-income households or agricultural production, 20% of the lowest-income households, accounting for nearly 50% of agricultural income, wage income and business income accounted for only 13% and 5%. This reflects the current low rate of return of agricultural production reality.

Our website, you will see what is the real Chinese competitors, the responsible plastic injection molding maker  -Fair competition in a non-potent weed

China quality molds and products supplier selection

Luxury sports car maker Aston Martin has announced a global recall

Aston Martin ignore its internal processes for a range of procurement, vendor and product monitoring problems,since November 2007 produced a total of 17,590 sports car, called the discovery of parts of China for the production of sub-suppliers in Shenzhen KEXIANG mold companies（Shenzhen KeXiang Mould Tool Co Limited） use fake plastic material. In this regard, caught in storm in Shenzhen KEXIANG mold company responsible Ang Zhang announced that denies its production Aston Martin • Over parts. China has a lot of plastic injection molds and products manufacturer, they serve different target customers, some companies large scale, but the basic outsourcing, in fact, customers need to find is a real experience, and provide long-term senior custom mold for overseas customers and plastic products suppliers, CN-MOULDING no doubt that customers really need to find manufacturers.Since its establishment in 1997, the years from different companies for their commitment to providing quality automotive parts, medical equipment, industrial supplies, electronic components, small appliances mold design and manufacture of lastic products processing factories. The company currently employs 80 people,The significance of the quality of the enterprise:

Quality control for plastic injection molding in china

Parts made in a plastic injection molding process can have their own unique set of possible defects. That is why all of our employees are trained to spot these problems. The following is a listing of the most common defects associated with the plastic injection molding and transfer/compression molding processes:

Sink Marks: Sinking is caused by the outer skin of plastic solidifying while the material inside is still molten and viscous. As it cools and solidifies, the material compacts . The best way to avoid these dimples is to design the part with a consistent wall thickness. However, many times the effect of the sink mark can be minimized by adjusting molding parameters such as injection pressure and time.

Gas marks (burning): When molten plastic is injected into a mold cavity, the air that is in that cavity needs a place to escape. If the hot compressed air cannot escape, it may leave burn mark on the part. The best way to avoid gas marks is to strategically locate air vents of the proper depth within the mold. Adjustments to process parameters such as injection speed and screw speed can be altered to reduce or eliminate burning.