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Thermoplastic injection molding

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Thermoplastic injection molding

ST. construction of moulds for plastic materials, technical and sports articles. We specialise in the construction of mono-injection and bi-injection moulds in aluminium and steel for any type of plastic product. We have a workshop with 10 high quality workcentres with 3, 4 and 5 axes, and various CAD-CAM stations for designing mouldst. The largest tecnology for moulds plastic materials.

Moulds for plastic materials
Unique prototypes, perfectly finished, made with high quality materials for guaranteed long-life, with high-tech design solutions starting from the drawing or mathematical model of the final product supplied by the customer, SI.MEC’s technical office develops the mould project, in constant co-operation with the customer, offering the solutions most suitable for the specific characteristics: in this phase, the creativity and experience of the technicians integrate with the use of constantly evolving software.

ST group moulds- custom plastic injection molding service company in China
solutions for designing and making mouldsThanks to the on-going innovation of the software programs we use, we can pin-point the best solutions for designing and making moulds. Our technical office is always ready to adopt new solutions to satisfy the customer.

We are presenting some of our projects, achieved with renewed creativity, with the tiniest details taken care of, by controlling all process stages of the production of thermoplastic injection molding.

Plastic moulds parts
Unique prototypes, perfectly finished, made with high quality materials for guaranteed long-life.

A wide range of products and moulds for the plastic material industry like:

plastic mold partsElectroerosion for moulds for plastic material
Pallet changes
Mould adaptation
Polishing
Sandblasting and assembly
Plastic mould parts

the molding company
Injection moulds
Co-injection moulds
Manufacturer of plastic moulds
Plastic moulding

Plastic Molding Manufacturing
Injection mould
Moulds design
Moulds manufacturing

plastic molding company
Thermo plastic moulds
Moulds for plastic
Plastic materials for technical and sport articles
For further information about our products catalogue, please visit our official website: www.simec-moulds.com

Plastic Molding Manufacturing

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Plastic Molding Manufacturing

Products Souring is prolix & painful, it will take weeks & months without guarantee of success, don’t waste your time & effort in the Trade Directories, go straight to the right source: Plastic molding Manufacturing company in China. is your best choice, we can guarantee your satisfaction.

Plastic Injection molding China Limited. was set up in 1980 & has developed to become a renown manufacturer an

d exporter in Hong Kong, our factory is located in Shenzhen & Dongguan which has employed over 800 skillful workers & has accumulating more than 20 years proficient experience in manufacturing of Plastic Products, Automobile Sun Shade, Blind, Gift & Household Products, Winter/ Summer Protection, Sunglass Case, Travel Cushion, Steering Wheel Cover, Foldable Laundry, Seat belt Shoulder Pad, Collapsible Play Tent, Back Seat Organizer, Littering Bag.

We have procured the ISO 9001 quality assurance certificate in June 2000, this certificate certify that all our products are finished with the highest quality.

With continuous growth in the market share in recent years, we have implemented a series of expansion plan which includes:
* Setting up of a doubled size new factory in Dongguan total flooring of which exceeds 150,000 square feet.
* Bring in latest technology to ensure our products are innovative, stylish and reliable.
* To establish the R & D Department to explore new products/market such as household plastic ware.

Our R & D department will keep on launching new products and designs from time to time, of course, Customers’ Tailored & Licensed Designs are most welcomed, we are proud to announce that we have maintain the championship in Stitched & Imprinted Products in the last 10 years consecutively.

Apart from background & quality, we truly believe good service & competitive price are equally important in product sales, our marketing team are multi-lingual, highly pofessional & reliable for further information, you are welcomed to contact our Marketing Dept. kindly note that brochure are available upon request, thank you for your attention, we look forward to serving you in the near future.

As a leading provider of enterprise management and plastic moulding production monitoring systems, IQMS is dedicated to providing software that meets the plant management, manufacturing, warehouse, inventory and accounting needs of the Plastics community.

Training Programs
With a full-featured system such as IQWin32, the opportunities are endless. The IQMS training programs will teach you not only program functionality but more importantly how to USE the system and the data to benefit your organization’s production monitoring, plant management and warehouse, inventory and accounting operations.

Training Facilities
To meet the various customer-training requirements, training is provided both on-site, and in-group sessions.

Want to know more information about plastic mold and palstic injection molding you can check our website and know more.

Plastic Injection Molding In China

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Plastic Injection Molding In China

Plastic injection molding in China is at a high level of expertise in comparison with other Asian countries. Taiwan also has much better working conditions, environmental regulations and worker relations than most it’s neighbors.
Government policies that have enabled the plastics industry to develop in a free-market manner. This has enabled the plastic injection molding industry to develop to a high technical level. The open market nature has given fair competition the ability to bring in high end jobs and industries.

What are some advantages of China injection molding manufacturers?

  • Decades of industrial growth and stability without destroying the environment
  • Safe and healthy working conditions for the employees. Taiwan has a long history or good human rights relations which reflects in it’s labor laws.
  • For the environment. Industry has cooperated with the government to keep the island clean and relatively unpolluted
  • Costs are generally one-third less than those of the USA. This means you can receive high quality at reduced prices.
  • Thermoplastic injection molds, thermosetting molds, and custom molds of all types have developed to a high level of expertise.
  • No history of human rights abuse

What are some industries China specializes in?

China has an excellent relationship with the US, Europe and Japan because of it’s political and economic system. This has enabled the island country to attract leading aerospace, automotive, electronics, computer, and small appliance companies.
How can you find a reliable plastic injection molding company in China? A good place to begin your search is here One of the top companies in Taiwan for thermoset molding is Longzu Plastic Molding Company They have been in business for over 40 years, which is a lifetime in plastics.

EDM Supplies

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EDM Supplies For WEDM And Sinker Electrical Discharge Machines

EDM supplies are often overlooked in the rush to get things done in a precision machine shop, tool-and-die shop or Plastic injection mold making shop. This wastes both time and money, yet the solution is quite simple.

Without the best EDM supplies, quality and production both suffer. Also, the workforce morale takes a beating because even the simplest of tasks becomes very time-consuming without the proper equipment and EDM tooling.

Typical WEDM supplies

  • Precision brass hole drilling tubes (hole popper tubes)
  • Filter cartridges
  • Resin-virgin and regenerated
  • WEDM tooling such as System 3R, Hirschmann, Erowa and Hermann Schmidt
  • EDM wires
  • Replacement parts
  • Rust inhibitors
  • Chillers
  • Metal polish
  • Cleaners
  • Magnets

 Typical Sinker EDM supplies

  • Graphite, copper and copper tungsten electrode material
  • EDM tooling such as System 3R, Hirschmann, Erowa and Hermann Schmidt
  • Tapping electrodes
  • Dielectric fluids
  • EDM filters
  • Chillers
  • Rotating spindles
  • Tubing chucks
  • Magnetic chucks
  • Pallets
  • Surface finish gauges
  • Inspection equipment
  • Microscopes

Take the time to find the best solution for each aspect of EDM

One shop owner I know invested heavily in a CNC sinker EDM, yet neglected to buy any additional tooling. He failed to see the wisdom in upgrading his accessories and thus rendered his new EDM to the status of a fancy manual machine.

Rather than add accessories piecemeal, include the necessary tooling in the initial package, or at least make a coherent plan to build up the tooling over time.

A very short history of EDM tooling

For the general public EDM is still a relatively unknown metalworking process. Unless one has personal experience or knows someone who works in this field, chances are quite good that the world of electrical discharge machining is a mystery.

Like any specialized industry, EDM has it’s own terminology and way of doing things. The slang that is used could easily mislead a bystander into thinking something quite different is going on than is actually the case.

Words like tweak, bump, tickle, feather, smack, toast, NFG, fudge, hide and zit are all used on a daily basis. Actually, zit is less common now than in the past, due to improved circuitry and techniques. A zit is a DC arc, or pit that is EDM’d into the steel by mistake.

With the ever-improving technologies available today, EDM has moved away from being somewhat of a black art and into a fully explainable and manageable metalworking process. No longer is it a machine of last resort or specialty, but a mainstay of the industry.

Robots, electrode changers and pallets for sinker EDM

At one time, not so long ago, electrodes were set up manually, requiring continual operator attention. There were no standardized holders and most people used angle blocks, vises or Vee-blocks to set up and hold electrodes. This actually worked quite well, but is very time-consuming and demands a high level of skill.

Next came the standardized electrode holders, such as System 3R. This changed everything almost overnight. Now electrodes could be moved from the milling machine, lathe or grinder and installed in the sinker EDM with no set up time.

Improvements were made on the holders and the repeatability and reliability increased dramatically. Pneumatic chucks made the process simpler and more accurate.

Tool changers were built into the sinker EDM to enable overnight machining and less operator involvement.

Now there are robots that select workpieces mounted on pallets and change electrodes, leaving the guesswork entirely out of the equation. These sophisticated tools require a high degree of organization, but once set up they can run almost indefinitely. Some tool magazines can hold 100’s of electrodes and many pallets with mounted workpieces.

Add pre-setting stations and inspection stations to the process and you truly have a complete manufacturing cell for the EDM department.

More articles on EDM manufacuturing of plastic molds please go to this website site.

How to make plastic injection mold

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How to make plastic injection mold

The process of making a plastic injection mould consist of determining what should be the size of
the mold, designing the mold, ordering required materials for the design, creating a rough shape, heating the mold, precision machining, wire cutting, polishing and fitting and trial of the mold.

Step 1: Determining the size of the plastic injection mold.

This process is not hard and does not require a lot of time. The end product, the plastic shape, determines the size of the mold.

Step2: Designing the mold.

Computer CAD design is used to draw the design. First set a 2 dimension layout and make sure you have all the mold
design features marked such as the size of the mold, parting line, the layout of the cavities are all set. Note the information that will be needed such as the mechanical design and the accessories that will be used.

After the two dimension layout made is satisfying and all information is noted make a
detailed 3D design. This will require programming skills to create. It may take some time to complete the designing with regards to the complexity of the mold.After the first 3D design is made it is necessary to assess any need for adjustments and the flow of the mold.

Step 3: Ordering the required molding material

After your design drawing is completed its time to order the required material. This may include desire steel, cutting tools and plastic part samples.

Step 4: Creating a rough shape of the plastic molds

Sizing of the steel then milling and drilling comprises this step. Make the desired steel shape and drill the holes needed as per the design in a rough work machine. Leave polishing and smoothing for later.

Step 5: Heating the mold

Heating is done as a form of treatment after creating the rough shape to harden and balance the created steel shape. Not every type of steel may need heating, an example, the P20.

Step 6: Precision machining.

Precision machining works slower due to the hardened steel properties but will get the design dimension created as per the design drawing.

Step 7: Wire cutting and EDM

Wire cutting is a process where special holes are made in to the design. These holes include pin holes for the ejector, for the lifters and the inserters. EDM helps work on narrow spaces which cannot be machined easily or where the space is too small for the cutting tool to get in.

Step 8: Polishing and fitting
polishing and fitting the created mold in to the mold maker machine follows.
The mold maker machine will collect all parts put into it and will follow the
design drawing to make the finished plastic mold. When the machine work is done further
polishing and engraving follows to complete the design.

Step 9: Trying the mold.

After the mold is created it will be good to try if it will work for the desired plastic shapes. The mode is installed in the plastic injection molding machine and injection parameters are set to work on the plastic samples acquired. If the mold is good enough for the job, well and good, the mold creation process is complete. You can now proceed to create the desired plastic products or sell the design to another company.

Injection Molds

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Injection Molds

The world has become very dependent upon plastic products. From household items to industry and aerospace, plastic in its many formulations has transformed modern manufacturing and created conveniences and economies unimagined in the early decades of the 20th century.

Injection Molds
The injection moulding industry took hold in 1946 when James Hendry built a screw injection molding machine. But, his technology was based on an earlier invention by John Wesley Hyatt who, in 1868 injected hot celluloid into a mold to make billiard balls. Hyatt’s method used a plunger to force the ma

terial inside a mold. Hendry’s improvement was revolutionary because it eliminated the plunger and replaced it with an auger-type action that better distributed material and facilitated the use of plastic inside molds.

 

Today’s plastic molds use much the same process and produce a wide variety of products from car panels to outdoor furniture, small toys and tools. Injection molding is ubiquitous in manufacturing and uses many different materials from polymer plastics to aluminum, copper and other metals. The plastic bottles and kitchen implements people use in everyday life are products of the injection process.

Because the metal molds are generally expensive to produce, Plastic molding is most economically used when thousands of pieces are being manufactured. Molds are made of hardened steel or, more recently, aluminum which is less expensive.

The Injection Process
Described very simply, molten plastic is injected into the mold under high heat and pressure. The goal is to have the molten plastic material evenly flow to all parts of the mold, creating an exact, consistent, solid plastic replica of the mold cavity. After a brief cooling cycle, the mold or tooling mechanically ejects the plastic part which then moves on through the manufacturing process. In the injection molding industry, this is a completely automated process that’s very fast and extremely efficient.

Rotational Molding
Rotational molding is yet another method of producing multiple products, most often made with a variety of plastic powders. This process is usually used in making hollow products such as traffic cones, canoes, kayaks, bicycle helmets and giant tanks used for water or chemical storage.

Like Injection molding, rotational molding had its roots in the 1940s. But it was not until the technology was more sophisticated and new polymer and plastic formulations became available that the rotational process became a mainstream manufacturing method.

Rotational Process
The two processes are quite different. Let’s consider, for example, a 300 gallon water storage tank made of polyethylene. Picture a master mold made of aluminum or steel. The plastics manufacturer pours poly resin powder into the mold that is fitted inside an oven. Once sealed, the mold is mechanically turned on at least three axes, moving much like a gyroscope. At the same time, the oven is raised to an appropriate temperature and the polymer – or other material – tumbles inside and slowly coats the inner walls of the mold, melting as it rotates.

Once the optimal temperature is reached, the mold is cooled. As the temperature of the mold itself falls, the product on the inside shrinks away from the inner walls and is easily removed. This is not always the case with injection molds that are often more difficult to successfully remove. The shrinking action of rotational molding is particularly desirable when the product is very large and awkward to handle.

Rotational molding is also more economical for some products because less material is used. In addition, the polymer that is left over from one mold can be used in another. The method itself is more streamlined than injection molding, which requires more interlocking parts.

Materials Improve and Expand
Most products made with the rotational molding method are from the polyethylene family. Other materials include nylons, polypropylene and PVC plastics. Some manufacturers have developed formulas that integrate the use of natural materials such as sand and chips of stone to make products.

Plastic and resin products are now an integral part of everyday life and supply us with items as tiny as paper clips and as big as storage tanks. As the industry developed, so too has environmental awareness about the safety and use of these petrochemical-based products. Today, materials can meet the specifications of FDA requirements, and other health and safety related regulations. Producers are also cooperating to create products that can be recycled.

Injection Molding

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Non stick coatings for injection molding Parts?

Yes! Just recognize the difference between ‘lubrication’ and ‘release’ and you need never fail again.

Today, there are a number of hard coatings for you, the mold maker, to choose. Many are conformal in nature and replicate surface geometry and finish. Many, too, resist thermal oxidation and can wear well. But what about release? You know, actual non-stick properties, like an egg cooked in a fry pan?

The answer for injection molding is not lubrication. And here is why.

Lubrication is defined as a means to reduce friction or wear. That is true. But it is meant to be a substance between two bodies in relative motion, a load bearing interface between two solid, cohesive surfaces. And that is not what you find when you heat the mold surface above your material glass transition temperature (Tg). Which is why hard coatings designed exclusively for lubrication fail.

Depending on the compounds you are molding, ‘sticking’ failures can manifest in a number of ways: skinning, loss of polymer mobility, lower gloss and surface roughness. Hard coatings ‘with lubrication’ can negatively affect heating and cooling which, alone, can alter depth and visibility of weld lines.

On the other hand, hard coatings for non stick can make significant improvements to finish. Surface flaws can be eliminated. And that means no more painting. Structural imperfections, too, like molded in stresses, which lead to warping or distortion, can be a thing of the past.

Unfortunately, Plastic mold makers who have had negative coating experiences are reluctant to re-consider. No different than those currently experiencing satisfactory but marginal performance. Why change, they say. Especially when you believe you have tried or know about all the coatings available, today, like plating, Teflon or PTFE, PVD or PACVD.

So, where is your answer? Just ask around. You will not have to look far. The answer, you will discover, is with those who understand surface forces, the characterization of adhesion, non stick coatings for injection molding parts.

Want more information? Need help with your surface engineering?

William Gunnar, a degreed scientist, researcher, engineer, and friend, has helped thousands of ‘best of class’ product designers and equipment manufacturers — for nearly 20 years now — surface engineer with coatings for success.

His publication, brings wisdom, honesty, leading edge information, and no nonsense advice to thousands weekly. Put together by some of the world’s leading experts in coatings and manufacturing, his FREE newsletters are truly must-reads for those who want to be ‘in-the-know’.

What Is Plastic Molding

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What Is Plastic Molding

Plastics are synthetically produced non-metallic compounds. It can be molded into various forms and hardened for commercial use. Plastic molding products can be seen everywhere. Examples are jars, protective caps, plastic tubes, grips, toys, bottles, cases, accessories, kitchen utensils and a lot more.

Even the keyboard and the mouse that you use are made through plastic molding. Even the plastic parts of the chair that you are sitting on are created this way.

The basic idea in plastic molding is inserting molten liquid plastic into a ready shaped mold, for example the mold of a bottle. It will be then allowed to cool, then the mold will be removed to reveal the plastic bottle.

Plastic moulding can also custom-mold a wide variety of plastic products including: garden pots, cabinets, office trays and boxes, barriers, barricades and traffic signage and displays for product and marketing promotions.

If you are planning to go into plastic molding business, you should first know the different processes.  Choose from a plastic molding process that fits your budget, your expertise, and your resources. Here are basic definitions of various methods of plastic molding.

The Plastic Molding Processes:

1.      Injection Molding

In Injection Molding, melted plastic is forced into a mold cavity. Once cooled, the mold can be removed. This plastic molding process is commonly used in mass-production or prototyping of a product. Injection molding machines were made in the 1930’s. These can be used to mass produce toys, kitchen utensils, bottle caps, and cell phone stands to name a few.

2.      Blow Molding

Blow molding is like injection molding except that hot liquid plastic pours out of a barrel vertically in a molten tube. The mold closes on it and forces it outward to conform to the inside shape of the mold. When it is cooled, the hollow part is formed. Examples of blow molding products are bottles, tubes and containers.

Equipments needed in setting-up a blow molding business are relatively higher than injection molding.

3.      Compression Molding

In this type of plastic molds, a slug of hard plastic is pressed between two heated mold halves. Compression molding usually uses vertical presses instead of the horizontal presses used for injection and blow molding. The parts formed are then air-cooled. Prices of equipment used for compression molding are moderate.

4.      Film Insert Molding

This plastic molding technique imbeds an image beneath the surface of a molded part. A material like film or fabric is inserted into a mold. Plastic is then injected.

5.      Gas Assist Molding

Also called gas injection molding is used to create plastic parts with hollow interiors. Partial shot of plastic is then followed by high-pressure gas to fill the mold cavity with plastic.

6.      Rotational Molding

Hollow molds packed with powdered plastic are secured to pipe-like spokes that extend from a central hub. The molds rotate on separate axes at once. The hub swings the whole mold to a closed furnace room causing the powder to melt and stick to the insides of the tools. As the molds turn slowly, the tools move into a cooling room. Here, sprayed water causes the plastic to harden into a hollow part. In this type of plastic molds tooling costs are low and piece prices are high. Cycle time takes about 40-45 minutes.

7.      Structural Foam Molding

Structural foam molding is a process of plastic molding usually used for parts that require thicker walls than standard injection molding. Inserting a small amount of nitrogen or chemical blow agent into the plastic material makes the walls thicker. Foaming happens as the melted plastic material enters the mold cavity. A thin plastic skin forms and solidifies in the mold wall. This type of plastic molding can be used with any thermoplastic that can be injection molded.

8.      Thermoforming

In this plastic molding process, sheets of pre-extruded rigid plastics are horizontally heated and sucked down into hollow one-piece tools. When the hot plastic solidifies, its shape conforms to that of the mold.

Tooling costs are usually low and piece prices vary on the machinery.

Plastic molding is a very technical process. It needs experts in this type of manufacturing business for it to be competitive in the market. Therefore, a very scientific and systematic study should be first made before going into this endeavor, if you want to know more about us, please go to our mean website to know more.