steven's blog for plastic mold and plastic molding

plastic Mold is the basis for industrial production technology and equipment, in the electronic, automotive, electrical, electronics, instrumentation, home appliances and telecommunications industry, 60% ~ 80% of the parts have to rely on plastic mold, and mold determines the quality of the product quality high or low( plastic molding or injection molding ), therefore, mold has been known as the "mother." Mold is the "amplifier efficiency," produced by molds of the value of the final product, its value is often die a few times on a hundred times. Mold production process level and the level of science and technology content, has become the measure of a country's level of technology and product manufacturers an important symbol, which to a large extent determines the quality, effectiveness, new product development capability, the decision to create a country industry's international competitiveness. Mold & Die Industry in China in recent years, the skill...

Why do some parts just refuse to let go? Well, there are a couple of possibilities. It might be a mechanical situation like an undercut. Or it might be chemical adhesion. The result is pretty much the same. The part doesn't come out freely, "hangs up," is damaged, deformed or has a surface blemish. Regardless, it impacts cycle times and cuts into your profitability. A plastic mold release might be the best option to keep stubborn parts in check. How do you pick the right mold release? There are many types of mold releases: silicones, paintables, vegetable oils, PTFE's, waxes, etc. Here's how to choose. 1) Are you looking for a "universal" release to help avoid having several release agents in your plant? This will probably give you a less than best release for some jobs. But you can avoid possible part contamination if you use a single all-purpose release. 2) Will parts require sonic welding or be finished by painting, hot stamping, screen printing, pad...

plastic mold machines Hourly Rates Dipped Custom injection molders’ machine-hour rates dipped 1.3% on average in the second quarter of the year, according to 122 plants responding to our latest semi-annual survey. Rates have been dropping since the end of 2000. About 12% of respondents said their rates were lower in the second quarter than in the quarter before. Only 5% raised rates, and 83% did not change them at all. However, there were some signs that business was turning the corner at midyear. Molders’ average machine capacity utilization rose about 1.5 percentage points to 53%—still very low by historical standards. Almost 40% of respondents said their capacity utilization increased in the second quarter, versus 31% whose utilization was lower and 29% whose utilization was un­changed. This was the first time since early 2000 that more shops were gaining business than were losing it. Southeastern molders again enjoyed the highest capacity utilization, while those in the West had th...

plastic molding parts design March 22nd, 2009 Plastic injection molding is the primary process for manufacturing plastic parts. Plastic is known to be a very versatile and economical material that is used in many applications. Although the tooling is expensive, the cost per part is very low. Complex geometries are possible and limited only to mold manufacturability. Your computer monitor, mouse and keyboard are injection molded plastics. Injection molding involves taking plastic in the form of pellets or granules and heating this material until a melt is obtained. Then the melt is forced into a split-die chamber/mold where it is allowed to “cool” into the desired shape. The mold is then opened and the part is ejected, at which time the cycle is repeated. Design Considerations Part design should include draft features (angled surfaces) to facilitate removal from the mold. Depending surface length draft angles down to half a degree are reasonable. Typical draft angles should be about 1 ...

We often say that the plastic, are all collectively referred to plastic varieties, its application is extensive and, therefore, classification is also different. By end-use can be roughly divided into two general types of plastics and engineering plastics. General plastic such as polyethylene (PE), polypropylene (PP), polystyrene (PS), modified polystyrene (such as: SAN, HIPS), polyvinyl chloride (PVC), which are day-to-day the most widely used Materials, modest performance and low cost. Engineering refers to a number of mechanical parts or engineering structural materials such as industrial quality plastic. Its mechanical properties, electrical properties, on the chemical environment of tolerance, high temperature, low temperature tolerance, etc. are more superior characteristics, even at the project is technically able to replace some plastic mold or other materials. Common there is ABS, polyamide (abbreviated PA, commonly known as nylon), polycarbonate (PC), polyoxymethylene (POM),...

We must first know some of the basic injection mold knowledge before talking about plastic mold steel, first of all, the classification of plastic mold are generally is on the length of plastic mold by 5 grades, over a million times grade 1;grade 2:500,000-100 million;grade 3 :from 300,000 to 500,000;grade4:from 100,000 to 300,000, grade 5: 10 million below Grade1 and 2 need mold stell hardness after heat-treatment reaching around HRC50 , or plastic which is easy to wear, could violate the tolerance, so we should select steel heat afetr treatment showing better performance, but also at high hardness of the state has good cutting performance, of course, There are other considerations. I seldom come into contact with Chinese-made plastic mold steel, it can only introduce commonly used in the Pearl River Delta for imported raw materials. Usually chosen in Sweden 8407, S136, U.S. 420, H13, Europe, 2316,2344,083, or Japan SKD61, DC53 (the original mold for the metal material, the use of s...

First step: to conduct a feasibility analysis for the plastic mold design products ,taking computer chassis as an example, the first drawings of the components make use of design software products for group analysis of legislation, that is what our work of plans to ensure that plastic mold design drawings prior to the correctness of each product, on the other hand, we can be familiar with the various components in the entire chassis to know the importance of the key size, which in the plastic mold design is very good. Step two: after Product analysis job bing carried out, we will analyze what kind of plastic mold structure, and product scheduling process to determine the work of workers and to make use of design software products start at the beginning of Products general follow-up project forward from the start, such as one in five Product requirements processes, and stamping is completed at the beginning of Products Products Drawings from the start to the four projects, three project...