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Har Jing Plastic Mold Co., Ltd Been devoted to the research and development of the mold products all the time , has produced and sold and popularized . It is specialized mold manufacturer, mold maker, mold making, plastic mold, injection mold, plastic injection mold. The company has accumulated abundant practical experience in engineering and scientific management respect, the quality of becoming reconciled according to the new design, the products are sold well all over the world. Har Jing Plastic Mold Co., Ltd has an excellent team for designing, engineering and manufacturing. "Honesty and responsibility" is alwa Har Jing Plastic Mold Co., Ltd Been devoted to the research and development of the mold products all the time , has produced and sold and popularized . It is specialized mold maker, mold making, mold maker manufacturer, plastic mold, plastic mold manufacturer, injection mold, injection mold manufacturer, plastic injection mold, plastic injection mold manufacturer, mold manufacturer. The company has accumulated abundant practical experience in engineering and scientific management respect, the quality of becoming reconciled according to the new design, the products are sold well all over the world. Har Jing Plastic Mold Co., Ltd has an excellent team for designing, engineering and manufacturing. "Honesty and responsibility" is always considered as our faith and customers' satisfaction is the best measurement standard as our quality principle. We have been doing our utmost to be the top in the world by giving high attention to the policy of talent-oriented and enterprising pursuit. We provide our customers with high quality molds, reasonable price, fast delivery and good service to ensure our timely pace of entering into the market of new products by means of advanced technic and rich throughput, our good business cooperation with customes from USA, Canada, Russia, Australia, Japan, Southeast and North Africa countries has laid a solid foundation for our large market share. ys considered as our faith and customers' satisfaction is the best measurement standard as our quality principle. We have been doing our utmost to be the top in the world by giving high attention to the policy of talent-oriented and enterprising pursuit. We provide our customers with high quality molds, reasonable price, fast delivery and good service to ensure our timely pace of entering into the market of new products by means of advanced technic and rich throughput, our good business cooperation with customes from USA, Canada, Russia, Australia, Japan, Southeast and North Africa countries has laid a solid foundation for our large market share.
Directory of Die Mold manufacturers & suppliers with factories located in Taiwan and China. Products categories such as aluminum & die casting, mold making, custom mould parts, forging & forged Products, plastic & rubber injection molds etc...Offer best design, best services at Taiwan and China.
Each year, the Mold Making and Mold Design Division of the Society of Plastics Engineers looks for award recipients for its two awards: Mold Maker of the Year and Mold Designer of the Year. Potential recipients are solicited through the division's newsletter, ballots, trade publications, etc. This year, the division is requesting your assistance to put forth qualified candidates.
The awards are sponsored by DME and Progressive Components respectively. Recipients are awarded $500.00, which will be donated on their behalf to a technical school of their choice. The following information briefly outlines the criteria for the awards:
Expert knows that every industry has a need for a mold maker to speed up the manufacturing process or for new design work. Not all "hands on personnel" are adept for rigid and flexible mold making, so as a consultant, he has been brought in to demonstrate the use of the products available for the respective tasks. He would develop a "teaching program" with the help of management in selecting staff members to train. Again, the managers tell Expert what they want, the cost limits and chain of command to interface with to do the job right for their project. Expert's expertise in selecting the right materials, cost, and production time in mold making helps the company from the drawing board to production.
1.Potential health effects and symptoms associated with mold exposures include allergic reactions, asthma, and other respiratory complaints.
2.There is no practical way to eliminate all mold and mold spores in the indoor environment; the way to control indoor mold growth is to control moisture.
3.Reduce indoor humidity (to 30-60% ) to decrease mold growth by: venting bathrooms, dryers, and other moisture-generating sources to the outside; using air conditioners and de-humidifiers; increasing ventilation; and using exhaust fans whenever cooking, dishwashing, and cleaning.
4.Clean mold off hard surfaces with water and detergent, and dry completely. Absorbent materials such as ceiling tiles, that are moldy, may need to be replaced.
5.If mold is a problem in your home or school, you must clean up the mold and eliminate sources of moisture.
6.Clean and dry any damp or wet building materials and furnishings within 24-48 hours to prevent mold growth.
7.Fix the source of the water problem or leak to prevent mold growth.
8.Prevent condensation: Reduce the potential for condensation on cold surfaces (i.e., windows, piping, exterior walls, roof, or floors) by adding insulation.
9.In areas where there is a perpetual moisture problem, do not install carpeting (i.e., by drinking fountains, by classroom sinks, or on concrete floors with leaks or frequent condensation).
10.Molds can be found almost anywhere; they can grow on virtually any substance, providing moisture is present. There are molds that can grow on wood, paper, carpet, and foods.
How to Identify the Cause of a Mold and Mildew Problem.
How to Identify the Cause of a Mold and Mildew Problem.
Mold and mildew are commonly found on the exterior wall surfaces of corner rooms in heating climate locations.
An exposed corner room is likely to be significantly colder than adjoining rooms, so that it has a higher relative humidity (RH) than other rooms at the same water vapor pressure.
If mold making and mildew growth are found in a corner room, then relative humidity next to the room surfaces is above 70%.
However, is the RH above 70% at the surfaces because the room is too cold or because there is too much moisture present (high water vapor pressure)?
The amount of moisture in the room can be estimated by measuring both temperature and RH at the same location and at the same time. Suppose there are two cases. In the first case, assume that the RH is 30% and the temperature is 70oF in the middle of the room. The low RH at that temperature indicates that the water vapor pressure (or absolute humidity) is low. The high surface RH is probably due to room surfaces that are "too cold." Mold sources is the dominating factor, and control strategies should involve increasing the temperature at cold room surfaces.
In the second case, assume that the RH is 50% and the temperature is 70oF in the middle of the room. The higher RH at that temperature indicates that the water vapor pressure is high and there is a relatively large amount of moisture in the air. The high surface RH is probably due to air that is "too moist." Humidity is the dominating factor, and control strategies should involve decreasing the moisture content of the indoor air.
There are many rules for designing molds. These rules and standard practices are based on logic, past experience, convenience, and economy. For designing, mold making, and molding, it is usually of advantage to follow the rules. But occasionally, it may work out better if a rule is ignored and an alternative way is selected. In this text, the most common rules are noted, but the designer will learn only from experience which way to go. The designer must ever be open to new ideas and methods, to new molding and mold materials that may affect these rules.
There are other parting (or split) lines than those that separate the cavity and core halves. These are the separating lines between two or more cavity sections if the cavity must separate (split or retract) to make it possible to eject the molded product as the mold opens for ejection.
Figure 4.4 shows simple ``up and down'' molds. The machine clamping force holds the mold closed at the P/L. (In (B) and (C), the parting line could be anywhere on the outside of the rim, between the two positions shown, but is preferred as in (B).) In (D) we must consider the injection pressure p (as shown with small arrows inside the cavity space), which will force the two cavity halves in the direction of the the large arrow m. This force also exists in the other examples, but is resisted by the strength of the solid cavity walls, which do slightly expand during injection and then return to their original shape once the injection cycle is completed.
Since these side forces can be considerable (see Section 4.6), the mold plates (the ``mold shoe'') must be sufciently solid to Figure 4.4 Schematic illustrations of location of parting lines (P/L) (only one half of mold shown): (a) core, (b) cavity. (A) Simplest case: P/L at right angles to axis of mold. (B and C) Product with rim but still simple. P/L can be either as in (B) or in (C). (D) Simple product but with rim and projection. Cavity is split, creating an additional P/L 2.
4.4 The Parting Line 13 contain these forces and provide the necessary preload to prevent opening of the mold during injection. These side cores, or split portions of the cavities, can represent just small parts of the cavity, or even only small pins to create holes in the side of the products, but they could also be sections molding whole sides o a product, as, for example, with beverage crates or large pails.
People are exposed to mould everyday, both indoors and outdoors. Whether or not an individual experiences health effects depends on the following factors:
1. Underlying susceptibility if a persons immune system is depressed for any reason (i.e. individuals undergoing chemotherapy or kidney dialysis, pregnant women, very young or very old) he or she might experience health effects associated with exposure to mould
2. Degree of mould exposure if an individual is exposed to significant amounts of mould over a long period of time, he or she may experience health effects
3. Type of mould an individual may vary in his or her susceptibility to different types of mould
A wide variety of health effects may be associated with exposure to mould. Effects can be generally categorized as allergies, infection or irritation. Of the three main categories of health effects, allergy is the most common, producing symptoms such as sneezing and coughing in affected individuals.
When certain moulds are challenged for a food source, they may produce toxins (mycotoxins). Currently, there is no established relationship between inhaled mycotoxins and health effects. It is important to remember that people are exposed to mould every day, both indoors and outdoors. Many people will never experience health effects associated with mould.
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In the production of molded products, many types of dies or molds are used to confine the plastic mass of lmolding material while it sets or hardens to the desired shape.
These molds are mounted in some type of machine that will open and close the mold, apply high pressure as needed as needed, and facilitate lilling the mold by external means. The plastic material is held under pressure in the mold until it hardens sufficiently to hold its shape after ejection.
In many cases these units take the form of automatic molding machines with completely self-contained pressure pumps, automatic facilities for heating the material, and timers to control the various operations and sensors to signal malfunctions.
Steam, hot water, oil, gas or clcctricity are used to heat the mold and maintain temperature control. The kind of heating or cooling to be used for a given job is governed by the means available and the character of the job.
Large compression molding plants find considerable economy in the use of steam. High melt temperature dies and molds are heated by electricity or gas. Injection molds are electrically or hot-oil heated or cold-water cooled.
Other molds must be cooled by circulating water or refrigerant. Special mold temperature units are available for maintaining constant temperature in the molds. Some injection molds must be heated rather than cooled when the materials melt at high temperatures.
