Injection Molding products China manufacturer

Today is 13th Feb 2010 - the Chinese New Year Eve of the tiger year!

I representing our company best wishes to our customers of domestic and abroad, happly 2010 Chinese Tiger Year and a prosperous year for business and good health.

More of company and services you can visit our showroom: http://wuxiglory.en.made-in-china.com

Thanks & Regards,

Wuxi Glory Plastics Co.Ltd

Good new year to all of our customers!

Here we are providing this year’s best offer of our - 2″ Round Polypropylene Plastic EIFS Stucco Fasteners:

EIFS stands for Exterior Insulation and Finish Systems. The product is also called synthetic stucco, and refers to a multi-layered exterior finish that’s been used in European construction since shortly after World War II, when contractors found it to be a good repair choice for buildings damaged during the War. The majority of repairs to European buildings were to structures constructed of stone, concrete, brick, or other similar, durable materials.

Our plastic eifs stucco fastener/washer can nearly meet all your fixing needs in the EIFS wall system of stucco plaster, fiberglass mesh, trims …

For availability and price list, please contact us freely at  plastic@plastics-china.com or call directly +86 13914259787

Our show room for this plastic fasteners on: http://wuxiglory.en.made-in-china.com

Thanks you!

Plastic foam sheets have many applications. They can be used for thermal insulation or packaging purposes, or can be thermoforming into meat trays, eggs cartons, fast-food plates, and containers.

Generally the production of polymer foams by extrusion consists of the following steps. First, a polymer resin is melted in the extruder barrel by the shear heat generated from the screw motion. A blowing agent, which is a substance that can provide the gas (es) needed to foam the polymer, is premixed with the polymer resin or injected into the polymer when the polymer is melted. There are two types of blowing agents, namely chemical blowing agents and physical blowing agents. Chemical blowing agents are compounds or mistures that release a gas or gases as a result of chemical reactions. Possible reactions include the thermodecomposition, chemical reactions of the blowling agents, or interactions of the blowing agents with other components in the formulation. Physical blowing agents are substances that release a gas or gases as a result of physical processes, such as evaporation, or desorption at elevated temperature or reduced pressure. No matter what kind of blowing agent is used, the generated gas is dissolved in the polymer melt to foam a polymer/gas mixture. The mixture is extruded through the die where foaming and shaping take place. The pressure drop at the die exit causes the solubility of the gas in the polymer melt to drop. Consequently, the dissolved gas is separated from the polymer in the foam of bubbles; this process takes place as long as gas is available in the polymer melt and little resistance is encountered.

Two different foaming processes are used in industry, namely free-rise foaming extrusion and controlled foaming extrusion. In the free-rise foaming process, the extrudate is allowed to expand freely without any restrictions after it leaves the die. The die is designed to deliver the extrudate with a shape and size that approximates the desired profile. This pricess is good for production of a sheet or product with a simple cross section and a wall thickness in the range of 2mm ~ 6mm.

In the controlled foaming process, the extrudate is mechanically restricted by a cooled shaping section located right after the die. Because of the cooling, a solid skin layer of polymer is formed on the extrudated, which means foaming takes place only in the core of the extrudate. This process can be used to produce a sheet, tubing or any desired cross sectional shape with a wall thickness of over 6mm. As for solid plastic parts, most of them made by the process of injection molding.

Plastic foams can be defined as plastic materials that container at least two phases: a solid polymer matrix and a gaseous phase. It is possible to have extra solid phases in plastic foams, such as blend of polymers or fillers. Because of the void present in the material, foamed plastics have less material in a given volume than neat plastics. Therefore, the production cost of foamed plastic products can be significantly reduced since the material cost can constitute up to 70% of the total cost of a plastic product.

Plastic foams can be produced with densities ranging from 1.6kg/m3 to over 960kg/m3. In general, the mechanical properties of the foams sre directly proportional to their densities. As a result, high-density foams are usually used for load bearing applications, whereas low-density foams are used for thermal insulation or packaging purposes. With different production and post-processing techniques, plastic foams can be manufactured in a variety of shapes as required by their individual application.

For more informations or techniques about plastic injection molding process and production please visit our home page of Wuxi Glory Plastics of China, thanks for visiting my webblog.

In the extrusion process, polymers is propelled continuously along a screw through region of high temperature and pressure where it is melted and compacted, and finally forced through a die shaped to give the final object.

Extrusion is used to make three main types of products:
1. Standard frofile shapes such as rod, pipe, sheet, and irregular cross scections.
2. Extrusion around wire and cable as a protective coating.
3. Flim to be used alone and as coating for paper, cloth, amd other surfaces.

Each of these types can be made in varying sizes depending upon the size of the machine. Extruders are designated as to size by the diameters of the rotating screw. They range from large industrial extruders with screw diameters up to 6 in. or 8 in., down to the labotatory model with a 3/4 in. diameter screw. Extrusion is used only for the processing of the thermoplastic resins.

The scerw of an extruder is divided into serval sections, each with a specific purpose. The feed section picks up yje finely divided polymer from a hopper and propels in into the main part of the extruder. In the cpmpression section, the loosely packed feed is compacted, melted, and formed into a continuous stream of molten plastic. Some external heat must be applied, but much is generated by friction. The metering section contributes to uniform flow rate, required to produce uniform diamensions in the finished product, and builds up sufficient pressure in the polymer melt to force the plastic through the rest of the extruder and out of the die. Since viscous polymer melts can be mixed only by the application of shearing force, and additional working section may be needed before the die.

Modern trends in exturder usage include the twin-screw or multiple-screw extruder, in which two screws move side by side to opposite direction, providing more working of the melt, and the vented extruder, having an opening or vent at some point along the screw that can be opened or led to vacuum to extract volatiles from the polymer melt. Glory plastics company in China not only provides plastic injection molding solutions but also have plastics extrision molding services upon request.

Mosco city mayor Yury Luzhkov recently open fires on plastic shopping bags, hoping the supermakrts no longer provide nondegradable plastic bags to shoppers and will also charge them on environmental-friendly bags - this money will be used for charity purpose.

Also the Mosco officials declared a plan, that is till the year 2012 we will fully using degradable plastic shopping bags instead of nondegradable bags.

By keeking with Luzhkov’s order, this plan has been drafted by the company named NKO-Services, and will make discussion in the City hall next month, NKO-Services spokesperson said. ” a polluted nondegradable plastic bag which need at least 200 year for its biodegradation, and new biodegradable bags will finish the biodegradable process within 12 months.” said also by NKO-Services’ spokesperson.

That’s really a good news for protecting the environment by starting from plastic bags or other plastic scrap recycling.

Today - 1st, October 2009 is a big day for all Chinese people to commemorate, because today is the 60 anniversary of the funding of the People’s republic of China.

Here are ten stages of China to rise above:

1. The rising symbol - the victory of anti-Japanese war.

2. Second stage - the foudning of the new China and it’s development.

3. Third stage - social stability, population growth and high speed economic growth.

4. Fourth stage -  primany accumulation for industrialization.

5. Fifth stage - The reform and opening up policy, marketization, internationalization, and culture diversification on stakeholder.

6. Sixth stage -  The wealth explosion after the year 2000.

7. Seventh stage - The establishment of the harmonious society.

8. Eighth stage - The establishment of the Security Perimeter.

9. Ninth stage - Science and technology advancement as well as industries upgarde.

10 Tenth stage - Political system reform of the CCP and cultural renaissance.

…

Today - September 30th, 2009 is the 60 years founding eve of the People’s Republic of China.

Through years of reform and hard working, China has been walking for a long way from a impoverished country to a “well-being” country thanks to the peaceful environment after the world war two.

By the exciting evening, we would like say happly brithday to our great country and has a ever bright future.

Thanks all.

By Wuxi Glory Plastics Company Limited.

http://www.plastics-china.com

Followed the guideline also the spirit of our company, we are making continuous innovative development on our custom molded plastic products production. Weeks ago we helped a U.S company successfully created a new style EIFS Stucco Mechanical Fasteners - can be also called EIFS plastic washer.  This plastic plate widely applied on the EIFS wall system building through out the North American and the European countries after the second world war.

Belows are price list for different sizes of this EIFS wahers:

2″ only plastic washer plate 1000/box                                                  

2″ washer pre-preassembled with 1 5/8″ drywall screw 1000/box  

2″ washer pre-assembled with 2″ drywall screw 1000/box             

2″ washer pre-assembled with 2 1/2″ drywall screw 1000/box       

2″ washer pre-assembled with 3″ drywall screw 1000/box  

If interested, please contact for prices.           

All the pre-assembled drywall screws on the above quote are all galvanized, other optional screw surface treatment Hi-Lo, Ruspert is also available.

EIFS stucco washers and fasteners are made of high impact polypropylene can stand the temperature from -30 to 50 Celsius degree.

Please visit our online showroom: http://wuxiglory.en.made-in-china.com for details, or call directly +8613914259787 or email to plastic@plastics-china.com

Thanks for visiting our company blog of Wuxi Glory Plastics Company Limited.

Polymer Processing: Historical Survey
The beginning of plastics prcessing and extrusion prcessing is associated with the introduction of guta-percha into England during the 1840s and its commercial development as insulation for electrical wire. One of the eary pioneers of the new industry was Thomas Hancock’s younger brother, Charles Hancock, one of the founders of the Guta Perch a Cmpany. In his patents of 1846 ~1847, Chares Hancock described fabrication of guta-pfcha using a processing technology similar to that developed in the rubber industry largely by his brother. He used a “pickle” -type masticator for compounding guta-percha with additives incuding sulur and softeners. He also sheeted with rollers and vulanized the products wtih sulfur.
The first foamed plastics and rubber products were developed in 1846 in separate patents by the Hnacock brothers. Chares Hancock (English Patent No. 11032) foamed guta-percha using ammonium carbonate and similar compounds. Wilam Brockedon and Thomas Hancock (English patent No. 11455) produced foamed products using sulur chloride dissolved in a rubber or guta-percha solution.
The first ram extrusion devices were described in the patents of 1845 by Richard. A Broom  an (English Patent No. 10582) and Henry Bewley (English Patent No. 10825), which dis  cussed the manufacture of guta-percha thread, tubes and hose. Brooman’ s patent uses a five  hole die that produces five simulaneous continuous filaments which are extruded into a bath and taken up on a rll Bewley’s patent extruded tubes and hose. Chares Hancock, who was a part  ner of Bewley in the Guta Percha Company, is said to have developed insulation coating for wire using Bewley’s extrusion methods. Methods of coating wires are described in patents by Barow and Forster (Englsh Patent No. 12136) and by Siemens (English Patent No. 13062) in 1848′ 1850. The first great successes of guta-percha were its application to electrical insula  tion of the Dover-Calasi and trans-Atantic cables.
The development of continuous extrusion of plastics using screw extruders began with guta-percha and natural rubber and dates from the 1870s. The concept of screw pumping seems to be atributable to Archimedes. The earier use of screw pumps in the soap industry is described in the patent literature. The frst patent for screw extrusion is that of Mathew Gray of London in 1879 ( English Patent No.5056). Interestingly, the reason for the invention as cited by Gray is the existence of defects in coatings placed on wires. The extruder was fed from a two-roll mill or calendering device. There seems to have been independent developments of the screw extruder in Germany and the USA about the same time, but Gray’s patent is the first clear statement.

The  next stage in the development of cellulose nitrate as a plastics. The first moves in this direction during the 1860s by Alexander Parkes and Daniels Spill in England met with only limited success. Cellulose nitrate could not be melted and they used a range of volatile solvents that evaporated from their products. There left high levels of residual stresses which caused shrinking and cracking. Parkes and Spill had rubber-processing backgrounds and apparently used rubber-processing machinery. In the USA, John Wesley Hyat and his brother Isaiah Smith Hyat found that compounds or solutions of celulose nitrate in nonvolatile camphor produced more desirable products. This was caled Celuloid. The Celuloid Manufacturing Company was formed in the 1870s in Newark, New Jersey, to exploit this product and proved to be a great success. The Hyats and their associates developed many important industrial process  ing operations to exploit Celuloid.
An 1872 patent by the Hyat brothers (US Patent No. 133229) contains both the reinvention of the ram extruder and the first ram injection molding machine. They caled this a stufing machine. John Wesley Hyat later described the use of complex muliple-cavity molds to be used in conjunction with the stufing machine. This would either mold objects or coat cores of objects in the mold.
In an 1878 patent, John Wesley Hyat (US Patent No. 204228) described the extrusion of Celuloid from the stufing machine over a mandrel coated with a lubricant. This mandrel could be programmable and expand to produce complex holow shapes. This led to the development of blow molding in 1881 by the Hyate’ coleague, Wiliam B Carpenter (US Patent No. 237168). Here, a preformed extruded tube is placed in a mold and is then expanded to fil the moldby pumping a heated fuid into the tube. These inventions were largely employed to produce a range of products incuding components of dolls and liners for pipes.
The 1880s saw the development of the synthetic fiber industry. Brooman’ s 1845 patent for the formation of guta-percha thread sets out clear procedures for producing fibers from the melt. The synthetic fibers sold commercialy in this period were produced from cellulose nitrate which could not be melted. A method of producing fibers by extruding acetic acid so  lutions of celulose nitrate into a water or alcohol coagulation bath was described by Joseph Wilson Swan (English Patent No. 5978) in 1883. Swan’s patent described the later carboni  zation of the fibers with heat and thus represents the beginning of the carbon-fiber industry. Swan’s application was filaments for incandescent lights. Shorty thereafter in France, the Count de Chardonnet (US Patent No. 394559) described a prcess for forming fibers from either alcohol solutions into a water coagulation bath. De Chardonnet produced much finer fibers than Swan, he formed a company and commercialized them as an artificial silk. Later, de Chardonnet (US Patent NO. 531158) described a dry spinning prcess in which the filaments were extruded into the air where the solvent was evaporated. Also, during the 1890s, using the system of and colaborating with Cross, Bevan and Beadle, Stearn invented a reactive spinning method in whch celulose is dissolved in a mixture of sodium hydrxide and carbon disulfide to form cellulose xanthate, which is extruded into an acd coagulating bath that regenerates the cellulose. This material became known a rayon.
The first truly synthetic plastics, phenol formaldehyde resins, were developed commercialy by Leo Hendrik Baekeland, a Blgian immigrant to the USA, just before 1910. These were poured as low or intermediate molecular weight liquids into molds where they were polymerized into three dimensional networks. Bakelte prducts were compression molded.