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Thermoplastic injection molding

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

What is the Process of Plastic Injection Moulding

What is the Process of Plastic Injection Moulding

The plastic injection moulding process produces large numbers of parts of high quality with great accuracy, very quickly. first to reach this requirement we need find plastic mold companies to make the plastic mold according to part design or part samples, this is first part of it to make plastic molding part by plastic moulding process, otherwise we can talk nothing about plastic molding process.

Nowadays

Plastic material in the form of granules is melted until soft enough to be injected under pressure to fill a mould.  The result is that the shape is exactly copied.  Once the plastic moulding has cooled sufficiently to harden the mould opens releasing the part.  The whole injection moulding process then repeats.

plastic mold

plastic mold and Close the plastic mold

CLAMPING – the moving and fixed platens of the injection moulding machine (see next section) holds the plastic mold tool together under pressure.

Inject Molten Plastic

INJECTION – the molten plastic that has been melted from pellet form in the barrel of the moulding machine (see next section) is injected under pressure into the mould.

DWELLING – after the molten plastic has been injected into the mould pressure is applied to ensure all cavities are filled.

COOLING – the plastic parts are then allowed to solidify in the mould.plastic mold company

Open Mould and Eject Part

OPENING – the moving platen moves away from the fixed platen (see next section) separating the mould tool.

EJECTION – rods, a plate or air blast then aids ejection of the completed plastic moulding from the injection mould tool.

The length of time from closing the plastic molds to ejecting the finished plastic moulding is the cycle.

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Prototype And Mold Design

Prototype And Mold Design

Usually, the new designed products aren’t perfect, even can’t use. before make plastic mold the prototype is the first step to verify the feasibility, is the most effective way to find out the lacking, defects and drawbacks of the designed products. Prototyping usually is just making several samples, and the delivery is fast, cost is low, and more important is we can quickly find and improve the designed products, which provides a sufficient basis for stereotypes and mass production.
1, Test appearance design. Prototyping is not only visual, but also in touch, and you can reflects the designer’s creativity in kind intuitively, which can avoid the abuse of“Beautiful design but not beautiful products”.

2, Test the design structure. As the prototyping is assembly, so it can reflects the rationality of the structure and Installation of the products intuitively

3,  Avoid the risk of directly plastic injection mould making

4,  Make the product available much earlier. As the prototyping is in advance, you can prepare for publicize, earlier sale, produce the products use the prototyping before the mould making is finished, in order to dominate the market as soon as possible

What We Can Do?

Our company as a medium-sized factory for plastic products and Plastic injection mold design, mould making, plastic moulding and assembly, also is famous in china in prototyping factory. In the early stage of our factory, we are mainly focusing on rapid prototyping and mould making. Now, we can provide plastic prototyping, silicon prototyping and metal prototyping. According to the requirements of the customers, we are mainly use SLA/SLS and CNC prototyping.

Our Advantages:

1 Lower cost and higher quality than other places

2 Fast delivery as we equipped with advanced machines

3 Experienced as our operators are all have more than five years’ experience

4 Production methods are optional as we can provide two choice: SLA/SLS and CNC.

5 Material sundry, you can choose plastic prototyping( mainly use plastic), silicon prototyping(mainly use silicon) and metal prototyping ( mainly use Aluminum-magnesium alloy and other Metallic materials)

6 We can provide signal or several prototyping products

7 System management in all links.

Plastic Mold Design Service

Our company is equipped with professional designers, using of advanced design software and provide free design services for customers. Only tell us your idea, we can provide the perfect product design and mould design. As equipped with two professional plastic products and plastic mold designers, we can provide any products and injection mould design service according to the needs of customers. And we can convert design drawings into different file formats according to customer requirements to help customers to preview. Of course, as a serious company, we will strictly try our best to protect client’s intellectual property.

Our Advantages of Design Service:

1,  Low cost and even no cost sometimes

2,  Convenient Communication. All our designers are in good English skills, including speaking, writing and listening.
3,  Advanced skills with the advanced design software
4,  Experienced as all the designers are of over 5 years of design and practice experience
5,  Fast delivery as we have professional skills, advanced software, experienced and convenient communication which improves the efficiency and shortens the design time
6,  Many kinds of file formats, we can provide many kinds of file formats for the design drawing according the customers’ requirements.
7,  It is combination of theory and practice. When we design, we will comprehensive consideration of aesthetic and practical, economic and operational.
8,  Strictly Confidential. We will absolutely strict protection of customer data and intellectual property.
9,  Perfect Service. We provide not only design service, but also provide prototyping cost,plastic mold cost and Injection molding cost.
10,  Customer Satisfaction. We have clients worldwide, and if necessary, they can give you a reference.

Plastic Molding Manufacturing

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

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.

How to make plastic injection mold

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 Molding Process

Injection Molding Process

The thought of processing PEEK (polyetheretherketone) or other high-temp resins can send nervous tremors through many a molder’s body.  I know, as a molder who learned the craft on a steady diet of PP and PE closures with their low melt temperatures and cold a plastic molds, my first PEEK experience made me edgy to say the least.  But I’ve since come to realize that PEEK is just another thermoplastic resin and, like the others, can be molded safely and efficiently with just a few precautions.

PEEK is widely believed to be one of the highest performing thermoplastics on the market and its end properties more than justify any trials and tribulations you may encounter processing it. PEEK is a linear aromatic, semi-crystalline thermoplastic having excellent wear, chemical and hydrolysis resistance. It has very low flame/smoke toxicity and excellent electrical properties that preclude the need for additives in many cases.

PEEK processes at a high melt temperature nearing 720°F, and both the press barrel and controls must be capable of this. On many plastic molding machines the high heat software is an option and I recommend ceramic high-temp heat bands whenever possible. A special screw and barrel are generally not needed, but consider hard units if running filled PEEK resins. We typically use sliding ring non-return valves, GP or Eliminator™ tips and don’t recommend ball checks or shutoff nozzles.

A hot mold is the key to achieving crystallinity in PEEK parts. Purging PEEK allows you to see the color change from a translucent to a solid colored crystalline state. If the mold is too “cold” (i.e. not hot enough) the parts will have that discoloration or partial translucency, and the quality of the end product will be compromised. The mold, in most cases, must be between 350°F and 450°F. This is steel temperature and requires oil or cartridge heat to maintain this level. Complex parts may require better temperature control so oil would be the preferred option. We also recommend the use of thermocouples to verify and monitor the steel temperature.Plastic Mould & Plastic Molds

These plastic molds must be specifically designed to run high-temp materials with draft, finish, undercuts and steel types all factored in from the beginning. Insulator plates between press platen and mold clamp plates are a must. The preferred steel type would depend on whether or not the resin uses any abrasive fillers but should have a minimum hardness of 52-54 Rc.

The resin also must be very dry to process well and achieve the desired end properties. This means that the resin must be at 0.02% moisture or below. We typically recommend drying the resin at 300°F for at least 3 hours. We also suggest the use of a moisture analyzer to assure dryness.

PEEK can be quite costly, but you should be able to use 30% dry first-pass regrind with unfilled PEEK and 10% with filled PEEK.

Safety should be a primary consideration when molding PEEK, both for purging and while working with the mold. Wear safety glasses and/or a face shield, Kevlar or Kevlar/stainless steel sleeves, and heavy cotton cloves when purging and reaching into the mold.

When preparing for your PEEK experience, research it well with your resin supplier. The above information is based on my experience, but it should used as a reference only. Also, make sure you don’t neglect recognized scientific principles when working with any thermoplastic material. With a bit of common molding sense, your PEEK experience can and should be a rewarding one. click here to get more detail about plastic molds and plastic molding technology.

Injection Molds

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.

Custom Injection Molding

Custom Injection Molding

If  your business needs plastic molding products with specific types and dimensions, then you should turn to custom injection molding companies. These manufacturers have the ability to make plastic parts for specific applications – they can customize virtually all plastic components per your requirements. They can stamp your logo or messages, produce unique colors and designs and package them specifically based on what you want and need.

Choosing a custom injection molding company

Most of the custom injection molding companies can produce any plastic product you specify, but not all of them go the extra mile to take care of ‘finishing services’ such as decorating, assembly, labeling and packaging. Some even have a design group that can assist clients with plastic part and mold design. From rapid prototyping and tooling to injection molding, ultrasonic and plastic welding and stamping, these companies can assist you every step of the way. Go for manufacturers that offer these added perks – you will end up saving time, money and effort.

Note that some custom injection molding companies do not do these extras in-house – they hire sub-assemblers and finishers, but are still able to produce products at par with your standards.

Also examine the manufacturing company’s logistics and scheduling system. They should be able to handle your delivery needs no matter how demanding they may be. You should also go for companies that implement strict controls to monitor the whole custom injection molding process. They should have the latest inspection equipment at hand to allow them to match the closest tolerance and thus provide quality consistently.

The custom injection molding company’s plant climate is also very important. They should have facilities that ensure mold cooling system control. You may contact any companies in the internet directory for your custom injection molding needs. injection Molding provides detailed information on Plastic Molds, Injection Molding, Plastic Injection Molding, Injection Molding Machines, Custom Injection Molding and more.

What Is Plastic Molding

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.